High heat grease

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What grease do I want to grease these pillow blocks? Regular grease melts.

IMAG0237.jpg
 
What temperature? Does it need to be Food Grade?

Kytox works the best in high heat applications. Upside is that they have H2 formulations...Downside is that it is very expensive.
 
The only reason I asked about food grade is that it looks like something being cooked in the picture.

Food Grade good to 370*F - LE - 4025 H1 Quinplex

FG good to 750*F - Kem-A-Trix - Thermo-Gel - TG40750 (has a temp spread of -40*F to 750*F)

Most of the Automotive sythetics go to around 300*F
 
Last edited:
Go to www.mcmaster.com and search for "high temp grease."

They have several.

Quote:
High-Temperature Grease with PTFE

The PTFE additive in these elastomer-thickened greases reduces friction and waterproofs metal surfaces, preventing rust and corrosion. They are NSF registered H2 for applications with no possibility of food contact. Temperature range is –35° to +458° F. Color is green. These products are compliant under all state VOC rules in effect on October 1, 2010.

Each
Size NLGI
No. Pkg.
Qty. Partial
Pkg. Full
Pkg.
0.75-oz. Tube 2 24 1243K31 $5.00 $4.44
Cartridge for Grease Gun (14.5 oz.) 2 16 1243K11 12.00 10.72
1-lb. Container 2 6 1243K12 10.96 9.83
5-lb. Container 2 6 1243K13 45.06 40.40
35-lb. Container 2 1 1243K14 __ 256.57


Quote:
High-Temperature Synthetic Grease

Increase the time between applications with these synthetic greases that handle your high-temperature applications. These products are compliant under all state VOC rules in effect on October 1, 2010.

Dow Corning Molykote 41—Thickened with carbon for excellent heat resistance. Color is black.

Dow Corning Molykote 3451—Fluorocarbon thickener adds chemical resistance to these white greases. NSF registered H2 for applications with no possibility of food contact.

Food Grade—Thickened with silicone, this blue grease is NSF registered H1 for applications with incidental food contact.

Food Grade with PTFE—These silica-thickened greases have a PTFE additive that reduces friction and waterproofs metal surfaces. NSF registered H1 for applications with incidental food contact. Color is white. Aerosols have a female stem.

With Moly—As temperature increases, so does the performance of this gray grease. It is thickened with sodium and contains molybdenum disulfide to withstand extreme pressures.

Each
Size NLGI
No. Pkg.
Qty. Partial
Pkg. Full
Pkg.
Dow Corning Molykote 41 (0° to +550° F)
5.3-oz. Tube 2 6 1252K32 $31.97 $29.02
Cartridge for Grease Gun (14.1 oz.) 2 4 1252K34 68.73 62.38
Dow Corning Molykote 3451 (-40° to +450° F)
3-oz. Tube 2 6 1252K61 57.54 52.23
Cartridge for Grease Gun (19.4 oz.) 2 1 1252K62 __ 298.32
Food Grade (0° to +500° F)
Cartridge for Grease Gun (14 oz.) 2 12 1359K1 16.40 14.76
Food Grade with PTFE (-45° to +450° F)
0.5-oz. Tube 2 12 1378K27 3.84 3.36
3-oz. Tube 2 12 1378K31 6.55 5.73
11-oz. Aerosol 2 12 1378K32 7.58 6.82
Cartridge for Grease Gun (14.1 oz.) 2 12 1378K33 10.88 9.79
14.1-oz. Container 2 12 1378K34 11.21 10.09
5-lb. Container 2 4 1378K35 57.55 52.02
30-lb. Container 2 1 1378K36 __ 298.92
With Moly (0° to +600° F)
Cartridge for Grease Gun (14 oz.) 1 12 1446K1 42.64 38.83
 
I'd go food grade... just sayin... You'll need H1 formula.

We have a lot of sucess with the Lubrication Engineers 4025 Quinplex
 
Check out Schaeffer's 271. It is an H1 grease that has an operating range of -40 to 500 degrees F and is bentone based. It retails for about 7 dollars per tube but you have to buy it by the case, which is 30 tubes. The other drawback is you have to completely purge the bearing of the old grease as bentone is not compatible with other greases.

If that is a problem then look at their 195 as this is good to 350 degrees F, 100% water proof, does not require a purge, and retails for about $6 although you have to buy at least 50 tubes per case.
 
1/2 a tube would last me about 3 yrs.
smile.gif
Maybe I should go another route. There are 4 zerks. Wonder if I could get a small gun and a tub of grease and putty knife it in the gun...or such.
 
Originally Posted By: opus
No, not food grade. Temp would be maybe 250 tops, but not positive.
is it just melting or thereafter hardening?
Can you post a picture of the melted grease condition? This helps in understanding the problem better!
 
Originally Posted By: opus
Its melting. It actually doesnt melt as badly as I was expecting.
just becoming fluid like or also dripping down ???
 
Bentone (clay) based grease is good at higher temperatures. Silica based grease is good at even higher temperatures. The challenge for you will be finding small enough quantities--just a tube or two. Either type of grease in not compatible with anything else. The bearing will need to be completely cleaned before you use either of these types of high temp greases. I've used Chevron Sil-X silica based grease on the throttle valve shafts of steam turbines (950°F steam) and they operated smoothly and came apart easily after three years of service (the shafts did not get to 950).
 
Originally Posted By: opus
I know, I havent been able to find anything in small quantities.
McMaster-Carr is always a good choice. The prices are fair, the items are good, the service is excellent, and the selection is amazing. You're bound to find something else to add to an order--I needed four pins, added an Allen wrench I'd lost from my set, added a center drill, and added a couple of other small things that my local hardware store doesn't stock.
http://www.mcmaster.com/#standard-grease/=k2sxbc
 
Originally Posted By: Ken2
silica based grease on the throttle valve shafts of steam turbines (950°F steam) and they operated smoothly and came apart easily after three years of service (the shafts did not get to 950).
OK thanks, so what temps did the silica grease see, if not 950F?
 
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