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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Making a part out of rubber
I need to make a part out of rubber. The part is obsolete and cannot
be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan |
#2
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Making a part out of rubber
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#3
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Making a part out of rubber
"Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan if this is what I think it is, you might consider using urethane adhesive, like the one 3M makes - you put a bead of it in place and then just put the parts together - |
#4
Posted to rec.crafts.metalworking
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Making a part out of rubber
"Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress |
#5
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Making a part out of rubber
On Sat, 21 Mar 2009 20:16:36 -0400, "Ed Huntress"
wrote: "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress Thanks Ed, that's exactly the direction I was trying to go. It looks like www.smooth-on.com probably has the stuff I'm looking for. Now I have to call them and start asking lots of questions. I'm thinking Shore A 90 durometer? Maybe someone here that has already done this will chime in and push me in the right direction. Dan |
#6
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Making a part out of rubber
On Mar 21, 5:54 pm, Dan@ (Pirateer guy) wrote:
I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan This is not a replay to the OP, but a request for WHAT IS THE DUROMETER for rubber grommets. I need to make one for a antique Lauson engine. So it needs to be flexible enough to push into a .25 hole, .1 thick groove, and .5 od. All square edges. I tried off the shelf, but nothing I found fit this. I would not suspect anyone would figure out a radius-ed version, but if I have to make one, I'll try exact replacement copy. This is for a ignition wire feed through from the magneto coil. And next would this be a castable material (flexible enough to insert into hole) that is procurable. ignator |
#7
Posted to rec.crafts.metalworking
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Making a part out of rubber
"Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan You could probably coat it with a butyl rubber or Marine aluminum compatible silicone caulk and fix it that way. But you could also contact a couple of outboard / outdrive shops and see if it is in old stock or is also used on outdrives. |
#8
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Making a part out of rubber
"Pirateer guy" Dan@ wrote in message ... On Sat, 21 Mar 2009 20:16:36 -0400, "Ed Huntress" wrote: "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress Thanks Ed, that's exactly the direction I was trying to go. It looks like www.smooth-on.com probably has the stuff I'm looking for. Now I have to call them and start asking lots of questions. I'm thinking Shore A 90 durometer? Maybe someone here that has already done this will chime in and push me in the right direction. Dan The stuff I was trying to think of is Devcon Flexane. I don't know if it's still available. Using it is covered in a good little book that I have around here somewhere, _How to Cast Small Metal and Rubber Parts_, by William Cannon. If you're patient, you can read it for free on Amazon. d8-) According to the book, a car-door weatherstrip is around Shore A 30. A car tire is around 50 - 60, and the cover of a golf ball is approximately 95. Flexane is available (or was) in Shore A 80 and 94, with an additive that will let you mix any *softer* degree of hardness. I hope it's still available. It's great stuff. I've used it, but not for 20 years or so. -- Ed Huntress |
#9
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Making a part out of rubber
On Mar 21, 7:29*pm, ignator wrote:
On Mar 21, 5:54 pm, Dan@ (Pirateer guy) wrote: I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan This is not a replay to the OP, but a request for WHAT IS THE DUROMETER for rubber grommets. *I need to make one for a antique Lauson engine. *So it needs to be flexible enough to push into a .25 hole, .1 thick groove, and .5 od. *All square edges. *I tried off the shelf, but nothing I found fit this. *I would not suspect anyone would figure out a radius-ed *version, but if I have to make one, I'll try exact replacement copy. *This is for a ignition wire feed through from the magneto coil. And next would this be a castable material (flexible enough to insert into hole) that is procurable. ignator- Hide quoted text - - Show quoted text - I have a book from TAB books on how to reproduce rubber parts, mostly for old car restoration. It gave sources and how-to tips. Not sure it's still in print, though, it's been at least 20 years since I got it. MSC used to have both castable urethane and silicone, kind of steep. "How to Cast Small Metal and Rubber Parts" by William Cannon, hah, Amazon still has it and on sale yet! Stan |
#10
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Making a part out of rubber
"ignator" wrote in message ... On Mar 21, 5:54 pm, Dan@ (Pirateer guy) wrote: I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan This is not a replay to the OP, but a request for WHAT IS THE DUROMETER for rubber grommets. I need to make one for a antique Lauson engine. So it needs to be flexible enough to push into a .25 hole, .1 thick groove, and .5 od. All square edges. I tried off the shelf, but nothing I found fit this. I would not suspect anyone would figure out a radius-ed version, but if I have to make one, I'll try exact replacement copy. This is for a ignition wire feed through from the magneto coil. And next would this be a castable material (flexible enough to insert into hole) that is procurable. ignator Take a look at How to Cast Small Metal and Rubber Parts on Amazon. The book lists the durometers of various car parts, so you may be able to figure out what's equivalent. -- Ed Huntress |
#11
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Making a part out of rubber
On Sat, 21 Mar 2009 23:25:26 -0400, "Ed Huntress"
wrote: "Pirateer guy" Dan@ wrote in message ... On Sat, 21 Mar 2009 20:16:36 -0400, "Ed Huntress" wrote: "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress Thanks Ed, that's exactly the direction I was trying to go. It looks like www.smooth-on.com probably has the stuff I'm looking for. Now I have to call them and start asking lots of questions. I'm thinking Shore A 90 durometer? Maybe someone here that has already done this will chime in and push me in the right direction. Dan The stuff I was trying to think of is Devcon Flexane. I don't know if it's still available. Using it is covered in a good little book that I have around here somewhere, _How to Cast Small Metal and Rubber Parts_, by William Cannon. If you're patient, you can read it for free on Amazon. d8-) According to the book, a car-door weatherstrip is around Shore A 30. A car tire is around 50 - 60, and the cover of a golf ball is approximately 95. Flexane is available (or was) in Shore A 80 and 94, with an additive that will let you mix any *softer* degree of hardness. I hope it's still available. It's great stuff. I've used it, but not for 20 years or so. Evening Ed Is this the stuff you're referring to? http://www-superkleendirect-com.nets...Devcon+Flexane Regards Bob rgentry at oz dot net |
#12
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Making a part out of rubber
"Bob Gentry" wrote in message ... On Sat, 21 Mar 2009 23:25:26 -0400, "Ed Huntress" wrote: "Pirateer guy" Dan@ wrote in message ... On Sat, 21 Mar 2009 20:16:36 -0400, "Ed Huntress" wrote: "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress Thanks Ed, that's exactly the direction I was trying to go. It looks like www.smooth-on.com probably has the stuff I'm looking for. Now I have to call them and start asking lots of questions. I'm thinking Shore A 90 durometer? Maybe someone here that has already done this will chime in and push me in the right direction. Dan The stuff I was trying to think of is Devcon Flexane. I don't know if it's still available. Using it is covered in a good little book that I have around here somewhere, _How to Cast Small Metal and Rubber Parts_, by William Cannon. If you're patient, you can read it for free on Amazon. d8-) According to the book, a car-door weatherstrip is around Shore A 30. A car tire is around 50 - 60, and the cover of a golf ball is approximately 95. Flexane is available (or was) in Shore A 80 and 94, with an additive that will let you mix any *softer* degree of hardness. I hope it's still available. It's great stuff. I've used it, but not for 20 years or so. Evening Ed Is this the stuff you're referring to? http://www-superkleendirect-com.nets...Devcon+Flexane Regards Bob rgentry at oz dot net Aha. That's close. That's the trowelable putty. It's also available as a liquid for casting. I went to Devcon's site and I see they still make the liquid. This looks like the one I used 20 years ago: http://www.devcon.com/products/produ...m?familyid=151 There are some other Flexane products that you can find by searching around Devcon's site. -- Ed Huntress |
#13
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Making a part out of rubber
" I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress here are two hints 1. Lynn Steele rubber makes a wide range of repro rubber parts (not particularly cheap) for old cars - I've used a lot of their stuff, generally it is well done and fits 2. Skinned Knuckles Press publishes a book on casting small rubber parts |
#14
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Making a part out of rubber
"Ed Huntress" wrote in message ... The stuff I was trying to think of is Devcon Flexane. I don't know if it's still available. Using it is covered in a good little book that I have around here somewhere, _How to Cast Small Metal and Rubber Parts_, by William Cannon. If you're patient, you can read it for free on Amazon. d8-) According to the book, a car-door weatherstrip is around Shore A 30. A car tire is around 50 - 60, and the cover of a golf ball is approximately 95. Flexane is available (or was) in Shore A 80 and 94, with an additive that will let you mix any *softer* degree of hardness. I hope it's still available. It's great stuff. I've used it, but not for 20 years or so. -- Ed Huntress Bill Cannon must have passed on by now, but he was the editor of a car restoration magazine called Skinned Knuckles - I published a number of articles in it a long time ago - Last I heard, I think his son was running the magazine - my articles are on my web page (at least some of them) - it was a really good magazine |
#15
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Making a part out of rubber
Ed's idea it great, but there is an alternative that I have used in the
past. If the shape can be acheived by a lathe or mill, you can place a rubber blank in liquid nitrogen and then turn it, occasionally pouring more nitrogen on it as you go. Steve "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan |
#16
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Making a part out of rubber
On Mar 21, 5:25*pm, "Ed Huntress" wrote:
"Pirateer guy" Dan@ wrote in message ... On Sat, 21 Mar 2009 20:16:36 -0400, "Ed Huntress" wrote: "Pirateer guy" Dan@ wrote in message ... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I don't have the specific reference, but casting-grade polyurethane rubber for making gaskets and such is, or was, available in three different durometers that correspond to a wide range of gasket types. I can be cast in Plaster of Paris, so it's very easy to work with. It's been used for decades to make reproduction parts for old cars. Maybe someone else can help you with a link. -- Ed Huntress Thanks Ed, that's exactly the direction I was trying to go. It looks likewww.smooth-on.comprobably has the stuff I'm looking for. Now I have to call them and start asking lots of questions. I'm thinking Shore A 90 durometer? Maybe someone here that has already done this will chime in and push me in the right direction. Dan The stuff I was trying to think of is Devcon Flexane. I don't know if it's still available. Using it is covered in a good little book that I have around here somewhere, _How to Cast Small Metal and Rubber Parts_, by William Cannon. If you're patient, you can read it for free on Amazon. d8-) According to the book, a car-door weatherstrip is around Shore A 30. A car tire is around 50 - 60, and the cover of a golf ball is approximately 95. Flexane is available (or was) in Shore A 80 and 94, with an additive that will let you mix any *softer* degree of hardness. I hope it's still available. It's great stuff. I've used it, but not for 20 years or so. -- Ed Huntress Part of it's on Google Books http://books.google.com/books?id=61e...+Parts#PPA6,M1 Karl |
#17
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Making a part out of rubber
"Pirateer guy" Dan@ wrote in message
... I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan "Steve Lusardi" wrote in message ... Ed's idea it great, but there is an alternative that I have used in the past. If the shape can be acheived by a lathe or mill, you can place a rubber blank in liquid nitrogen and then turn it, occasionally pouring more nitrogen on it as you go. Steve I worked at an opthalmic research co, this technique was used on a special purpose micro lathe for machining research contact lenses from a gel material. A cool idea! |
#18
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Making a part out of rubber
On Mar 21, 4:54*pm, Dan@ (Pirateer guy) wrote:
I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan Go to freeman manufacturing on line.They have every rubber and plastic thig known to man and downloadable videos. They have urathane for molds as well as silicones.They have a nearlt 90 min dvd for 8.95 ,which is also on ebay. You might want to get a sample kit at lower cost. Some of their stuff srts up in under 15 minutes . Their tooling epoxiie is very hard and they say its used for foundry paterns. |
#19
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Making a part out of rubber
You could probably coat it with a butyl rubber or Marine aluminum compatible silicone caulk and fix it that way. But you could also contact a couple of outboard / outdrive shops and see if it is in old stock or is also used on outdrives. It is absolutely not available anywhere. I belong to a saildrive group and this part has been discontinued for at least 20 years |
#20
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Making a part out of rubber
On Sat, 21 Mar 2009 23:54:25 GMT, Dan@ (Pirateer guy) wrote:
I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan I've not had a lot of experience with this but have made (hard) urethane parts using a silicone moldmaking material. Silicone is great because mold release normally is not needed; almost nothing sticks to silicone. You might find that a moldmaking urethane can be used as a casting material. Though most moldmaking rubber is quite elastic to allow the pattern to be removed. Bought my supplies from http://www.polytek.com . They have a pretty wide variety and reasonable prices. Best -- Terry |
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Making a part out of rubber
Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan Check MSC for Durathane-90 liquid. It's not a mould-making compound, it's for parts. LLoyd |
#22
Posted to rec.crafts.metalworking
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Making a part out of rubber
http://freemansupply.com/
Get the instructioal DVD. Everything you ever wanted to know, and all the supplies you need. JR Dweller in the cellar On Sat, 21 Mar 2009 23:54:25 GMT, Dan@ (Pirateer guy) wrote: I need to make a part out of rubber. The part is obsolete and cannot be purchased. I have one, but it has shrunk over the years and is now loose and it leaks water. The part is an isolation ring for a boat engine mount. It sits between two pieces of aluminum and is compressed by the two pieces. This allows some movement between the engine and the engine mount and it also seals out the water. I am thinking that I can use the existing part to make a mold to build a new part out of urethane. I can add bulk to the existing part to make up for the shrinkage. Problem is, all I can find on the web is urethane for making the mold not the part. Does anyone have any insight into how I can do this? Fairly complex part, but I have one to make the mold from. The link is to a parts manual that shows this part. It is on page 14, of 20 and it is Item Number 8. It is OMC part number 322214or OMC 393162. same part. Thanks everyone Dan -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth If you're not the lead dog, the view never changes Doubt yourself, and the real world will eat you alive The world doesn't revolve around you, it revolves around me No skeletons in the closet; just decomposing corpses -------------------------------------------------------------- Dependence is Vulnerability: -------------------------------------------------------------- "Open the Pod Bay Doors please, Hal" "I'm sorry, Dave, I'm afraid I can't do that.." |
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