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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Making a circular saw jig
I have a circular saw jig which I made myself and it uses bits of aluminium which are L shaped in cross section for the saw to run in.
I'd like to make a better one with longer "rails" and rather than using the L shaped strips, which tend to sag, I'd like to use tubing and I know you can get some things that run along tubing and probably have ball bearing in, but I can't remember what they're called. Can anyone tell me what these are called please so I can look them up online |
#2
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Making a circular saw jig
On Monday, 24 May 2021 at 20:13:55 UTC+1, Murmansk wrote:
I have a circular saw jig which I made myself and it uses bits of aluminium which are L shaped in cross section for the saw to run in. I'd like to make a better one with longer "rails" and rather than using the L shaped strips, which tend to sag, I'd like to use tubing and I know you can get some things that run along tubing and probably have ball bearing in, but I can't remember what they're called. Can anyone tell me what these are called please so I can look them up online Linear bearings. https://www.automotioncomponents.co....rom-automotion Tons and tons on ebay and ALiExpress, etc. You might find you need to use solid rather than tube - but that is way down the line! |
#3
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Making a circular saw jig
On 24/05/2021 20:13, Murmansk wrote:
I have a circular saw jig which I made myself and it uses bits of aluminium which are L shaped in cross section for the saw to run in. I'd like to make a better one with longer "rails" and rather than using the L shaped strips, which tend to sag, I'd like to use tubing and I know you can get some things that run along tubing and probably have ball bearing in, but I can't remember what they're called. Can anyone tell me what these are called please so I can look them up online I would call them linear bearings. They can be fully circular or part, so to fit round shafts or guide rails respectively. so: linear bearing pillow linear guide rail An idea: https://www.youtube.com/watch?v=UB80HojMDyg |
#4
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Making a circular saw jig
Great, thanks very much!
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#5
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Making a circular saw jig
On 24/05/2021 20:49, Fredxx wrote:
On 24/05/2021 20:13, Murmansk wrote: I have a circular saw jig which I made myself and it uses bits of aluminium which are L shaped in cross section for the saw to run in. I'd like to make a better one with longer "rails" and rather than using the L shaped strips, which tend to sag, I'd like to use tubing and I know you can get some things that run along tubing and probably have ball bearing in, but I can't remember what they're called. Can anyone tell me what these are called please so I can look them up online IÂ* would call them linear bearings. They can be fully circular or part, so to fit round shafts or guide rails respectively. so: linear bearing pillow linear guide rail An idea: Â*https://www.youtube.com/watch?v=UB80HojMDyg Yes, linear bearings. Available with or without shafts from people like Euro Bearings. They need to run on pretty accurate rod or tubing, which will add to the cost. I'd have thought you could get away with plain bearings, probably using one of the engineering plastics. Oilite bronze (on steel) would also work, but oiled or greased brass/bronze on steel would tend to attract sawdust. |
#6
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Making a circular saw jig
I'm starting to think I could maybe use some drawer runners actually!
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#7
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Making a circular saw jig
On 24/05/2021 21:23, newshound wrote:
On 24/05/2021 20:49, Fredxx wrote: On 24/05/2021 20:13, Murmansk wrote: I have a circular saw jig which I made myself and it uses bits of aluminium which are L shaped in cross section for the saw to run in. I'd like to make a better one with longer "rails" and rather than using the L shaped strips, which tend to sag, I'd like to use tubing and I know you can get some things that run along tubing and probably have ball bearing in, but I can't remember what they're called. Can anyone tell me what these are called please so I can look them up online IÂ* would call them linear bearings. They can be fully circular or part, so to fit round shafts or guide rails respectively. so: linear bearing pillow linear guide rail An idea: Â*Â*https://www.youtube.com/watch?v=UB80HojMDyg Yes, linear bearings. Available with or without shafts from people like Euro Bearings. They need to run on pretty accurate rod or tubing, which will add to the cost. I'd have thought you could get away with plain bearings, probably using one of the engineering plastics. Oilite bronze (on steel) would also work, but oiled or greased brass/bronze on steel would tend to attract sawdust. Ground steel rods are pretty common. Its then how you mount the rod, whether to support it from underneath as per the video or at each end. Most 3D printers use ones supported at each end, allowing for a complete circular linear bearing. I have seen the ones on guide rails used on very large machines such as CNC routers. The bearing will have seals which should keep dust and sawdust out of them. |
#8
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Making a circular saw jig
On 24/05/2021 21:34, Murmansk wrote:
I'm starting to think I could maybe use some drawer runners actually! I guess it depends on precision. Linear bearing generally have effective dust seals. For precision you can open ones that are adjustable: https://www.ebay.co.uk/itm/324462847...AOSwSOFgDVQ F Won't open drawer runners have an issue with collecting dust? |
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