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What the hell is going on with this grease?
To all the greasy folks here,
About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The all steel tapered roller bearings at both ends still have grease that works and looks like grease is supposed to. It appears that there is some kind of chemical reaction happening between the grease and the bronze gear. Anybody here know anything about this? Thanks, Eric |
What the hell is going on with this grease?
|
What the hell is going on with this grease?
On Sun, 12 Feb 2017 14:25:30 -0800
wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The all steel tapered roller bearings at both ends still have grease that works and looks like grease is supposed to. It appears that there is some kind of chemical reaction happening between the grease and the bronze gear. Anybody here know anything about this? Thanks, Eric Worm gears tend to run hot, more so than the your roller bearings. It might be getting warmer in there than you think it is (shrug). This web site has several articles on lube and worm gears: http://www.machinerylubrication.com/...ar-lubrication http://www.machinerylubrication.com/...080/worm-gears http://www.machinerylubrication.com/...ate-worm-gears Oil seems to be preferred over grease... -- Leon Fisk Grand Rapids MI/Zone 5b Remove no.spam for email |
What the hell is going on with this grease?
On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons
wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The all steel tapered roller bearings at both ends still have grease that works and looks like grease is supposed to. It appears that there is some kind of chemical reaction happening between the grease and the bronze gear. Anybody here know anything about this? Thanks, Eric Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric |
What the hell is going on with this grease?
wrote in message
... On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The all steel tapered roller bearings at both ends still have grease that works and looks like grease is supposed to. It appears that there is some kind of chemical reaction happening between the grease and the bronze gear. Anybody here know anything about this? Thanks, Eric Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric http://www.machinerylubrication.com/...ur-ep-gear-oil "Sulfurized mineral oil will readily stain copper under the conditions of the Copper Corrosion Test (ASTM D130), which uses a copper test strip, submerged in the test oil at 100°C for three hours as an indication of chemical reactivity to yellow metals." Also search for the Copper Mirror test. -jsw |
What the hell is going on with this grease?
On 2017-02-16, wrote:
On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. -- Remove oil spill source from e-mail Email: | (KV4PH) Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
What the hell is going on with this grease?
On 17 Feb 2017 03:23:41 GMT, "DoN. Nichols"
wrote: On 2017-02-16, wrote: On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. Anything with sulphur or chlorine will attack bronze.. I think I'd be looking at something like SKIL 80111 heavy duty worm gear saw lubricant - made expressly for bronze gears and extreme high pressure. 8 ounces is about $12. I bough a tube for my old 825. It is technically an oil, not a grease. Personally I have very little use for the typical white lithium grease,(like LubriPlate) |
What the hell is going on with this grease?
On Thursday, February 16, 2017 at 11:38:12 PM UTC-5, Clare wrote:
On 17 Feb 2017 03:23:41 GMT, "DoN. Nichols" wrote: On 2017-02-16, wrote: On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. Anything with sulphur or chlorine will attack bronze.. Damn, not cool. They actually sell bronze sink fixtures, too. |
What the hell is going on with this grease?
On Thu, 16 Feb 2017 23:38:09 -0500, wrote:
On 17 Feb 2017 03:23:41 GMT, "DoN. Nichols" wrote: On 2017-02-16, wrote: On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. Anything with sulphur or chlorine will attack bronze.. I think I'd be looking at something like SKIL 80111 heavy duty worm gear saw lubricant - made expressly for bronze gears and extreme high pressure. 8 ounces is about $12. I bough a tube for my old 825. It is technically an oil, not a grease. Personally I have very little use for the typical white lithium grease,(like LubriPlate) I've already reassembled the dividing head with some other grease that doesn't have any EP additives, I needed it to finish a job. But I am going to look into bronze worm gear specific greases because I have two other devices with some bronze gearing. That Skil 8011 stuff, does it stick like gease? Is it as thick as grease? The dividing head doesn't have a sealed reservoir, the grease just sticks to the works and doesn't drip off. Eric |
What the hell is going on with this grease?
On Sat, 18 Feb 2017 09:33:43 -0800, wrote:
On Thu, 16 Feb 2017 23:38:09 -0500, wrote: On 17 Feb 2017 03:23:41 GMT, "DoN. Nichols" wrote: On 2017-02-16, wrote: On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. Anything with sulphur or chlorine will attack bronze.. I think I'd be looking at something like SKIL 80111 heavy duty worm gear saw lubricant - made expressly for bronze gears and extreme high pressure. 8 ounces is about $12. I bough a tube for my old 825. It is technically an oil, not a grease. Personally I have very little use for the typical white lithium grease,(like LubriPlate) I've already reassembled the dividing head with some other grease that doesn't have any EP additives, I needed it to finish a job. But I am going to look into bronze worm gear specific greases because I have two other devices with some bronze gearing. That Skil 8011 stuff, does it stick like gease? Is it as thick as grease? The dividing head doesn't have a sealed reservoir, the grease just sticks to the works and doesn't drip off. Eric No, it's closer in consistency to EP140 Hypoid oil |
What the hell is going on with this grease?
On Sat, 18 Feb 2017 17:40:56 -0500, wrote:
On Sat, 18 Feb 2017 09:33:43 -0800, wrote: On Thu, 16 Feb 2017 23:38:09 -0500, wrote: On 17 Feb 2017 03:23:41 GMT, "DoN. Nichols" wrote: On 2017-02-16, wrote: On Sun, 12 Feb 2017 18:15:13 -0500, Ned Simmons wrote: On Sun, 12 Feb 2017 14:25:30 -0800, wrote: To all the greasy folks here, About 7 years ago I took apart my dividing head to make some changes. I completely degreased all the parts. When re-assembling the thing I used white lithium grease on all the parts that needed grease. Lately the rotating parts have become very stiff, as if the brake was on. I took it apart today and discovered that the white grease had turned into green glue. But only on the steel worm and bronze worm gear. The [ ... ] Some sulfur containing EP additives are not compatible with copper bearing alloys. It's a common concern with gear oils. I've never heard of an issue with grease, but if the grease was made from oil with non-compatible additives... Hmm ... perhaps it forms a sulfuric acid under pressure and load? Greetings Ned, I tried to find out what kind of oil is used in the white grease I have and have had no luck. But I'm thinking you must be correct about the sulfur, even though the grease is not described as having any EP additives. Can you try some PH paper on the remains to see whether it is somewhat acidic? Based on your post I am going to make sure that any greases I use in the future on bronze mechanisms do not contain sulfur or any other additives that can harm bronze. The grease in contact not only became a substance similar to thick glue parts of it turned into almost a solid. And conventional solvents used to dissolve greases had no effect I could see on the morphed grease when I cleaned it all out. Eric Hmm .... what about Molybdnium DiSulfide grease? I suspect that it would work well with copper-bearing metals such as the worm gear. (Unless someone else knows differently.) At least check with the makers to see whether they know of any such problems. Good Luck, DoN. Anything with sulphur or chlorine will attack bronze.. I think I'd be looking at something like SKIL 80111 heavy duty worm gear saw lubricant - made expressly for bronze gears and extreme high pressure. 8 ounces is about $12. I bough a tube for my old 825. It is technically an oil, not a grease. Personally I have very little use for the typical white lithium grease,(like LubriPlate) I've already reassembled the dividing head with some other grease that doesn't have any EP additives, I needed it to finish a job. But I am going to look into bronze worm gear specific greases because I have two other devices with some bronze gearing. That Skil 8011 stuff, does it stick like gease? Is it as thick as grease? The dividing head doesn't have a sealed reservoir, the grease just sticks to the works and doesn't drip off. Eric No, it's closer in consistency to EP140 Hypoid oil Ye gods, I'd rather smell rotting fish than hypoid gear lube. Hate that stench. -- In order to become the master, the politician poses as the servant. --Charles de Gaulle |
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