Providing Precision Lubricants and Lubrication Solutions


Open Gear and Bearing Grease: RPL-321

Product Description:

RPL-321 open gear grease is manufactured using a a high viscosity paraffin base oil, an aluminum complex thickener and a unique blend of special polymers including colloidal copper and bronze metallic lubricating solids which refurbishes worn surfaces by filling uneven surfaces in the metal. The resulting product is a tacky, tough grease with a tenacious lubricating film that offers complete protection for bearings, open and semi-enclosed gears.  The metallic solids helps reduce wear by preventing metal-to-metal contact and result in smoother and quieter operation.

The RPL-321 is 100% lubricant. It is free of all fillers such as textile fibers and/or asphalt materials that are sometimes present in lesser gear greases. The RPL-321 will cling to all types of surfaces, it will not drip, run out, or fling-off even at high speeds. It is self-healing and self-carrying so it can be quickly applied to one gear tooth and it will carry itself through the entire gear train. It is resistant to melting and chipping-off under load.
Typical uses include a wide range of open and semi-enclosed gear and bearing applications including printing presses, construction, forestry and mining equipment, railcars and precision equipment.

Features and Benefits:

• Contains colloidal copper and bronze particles to refurbish worn surfaces

• Self-healing and self-carrying for ease of application and long-life

• Will not drip, run out or fling-off even at high speeds

• Excellent water resistance

• Extra-tacky - will cling to all types of surfaces

• Contains no fillers

• High dropping point

• Excellent EP, rust and corrosion protection


Typical Operating Properties:

NLGI Grade 1 --
Colour Copper --
Thickener Aluminum Complex --
Texture Tacky --
Penetration, Worked
60 Strokes (0.1mm) 
275 ASTM D217
Dropping Point Over 260C / 500F ASTM D2265
Base Oil Viscosity
457.2 cSt ASTM D445
31.9 cSt ASTM D445
Viscosity Index 95 ASTM D2270
Pour Point -3C / 25F ASTM D97
Flash Point 288C / 550F ASTM D92
Copper Corrosion
Pass ASTM D130
4-Ball Weld Load 400 kg ASTM D2596
4-Ball Wear 0.60 mm ASTM D2266
Specific Gravity 0.964 ASTM D854

* Please note: The information, data and tables contained in this website have been carefully edited at the time of publication. However, no responsibility for possible errors or omissions can be assumed. We recommend contacting our Application Support Staff to discuss your specific requirements. We are constantly updating our products therefore technical data and specifications may change at any time without notice. 08/2017

Method of Application:

No special handling precautions are required. Follow regular maintenance instructions as provided with original equipment.

Available Container Sizes:

Size Metric US Imperial
Cartridge 0.41 L / 400 g 14 US fluid ounces / 0.88 lbs
Gallon 3.79 L / 3.4 kg 1 gal / 7.5 lbs
Pail 18.93 L / 16 kg 5 gal / 35 lbs
Keg 56.78 L / 54 kg 15 gal / 120 lbs
Drum 208.20 L / 181 kg 55 gal / 400 lbs
* NB: Sizes and weights are approximate.



Did you know?

We are pleased to offer a range of Food Grade open gear greases wherever incidental contact is possible.

For more information, please see the Food Grade Greases.


Material Safety
Data Sheets





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Davley Darmex Precision Lubricants, 2011