NHBB logo New Hampshire Ball Bearings

Skip to content

Lubrication

Selecting the best lubricant for a particular application is critical to achieving the full rated life of the bearing and optimal performance of the assembly, but choosing from the hundreds available can be an overwhelming task. The charts published below list a narrow selection of lubricants we use on a regular basis. They cover a wide range of temperatures, rotational speeds, load conditions and assembly designs. Please contact HiTech’s Applications Engineering department before making your final selection.

Oil Lubricants

Petroleum and synthetic oil lubricants are used in conjunction with a circulating system that maintains the proper oil level and removes heat from the bearing assembly. While oil is suitable for a wide range of operating speeds, it is the preferred method of lubrication for high speed applications. Petroleum oils are still widely used because of their excellent performance characteristics at normal operating temperatures and medium to high speeds. Synthetic oils are used in many critical high speed and high temperature applications because they possess improved thermal properties, lower volatility and superior viscosity. Synthetic oils encompass a wide spectrum of engineered fluids including diesters, silicones and fluorinated compounds.

Grease

Grease is ideal for applications where frequent replenishment of a lubricant is undesirable or impossible. Compared to oil, grease has a limited speed capability because it does not remove heat from the bearing and increases torque. Grease consists of a base oil, thickeners and other additives. The base oil acts as the lubricating agent while thickeners keep the oil in suspension before releasing it under pressure. The additives function as antioxidants, rust inhibitors and stabilizers.

Solid Film

Solid film lubricants are used primarily in situations where oil and grease lubricants would fail, namely in harsh conditions characterized by extremely high or low temperatures, the chance for radiation exposure or the presence of a vacuum (e.g., space). Most solid film lubricants possess a finite operating life because they cannot be replenished once they wear away from the contact surfaces, which make them best suited for light load and low speed applications. Solid film lubricants encompass everything from sacrificial retainers to graphite powders, molybdenumdisulfide powders and ion sputtering. Detailed information on solid film lubricants has not been provided here, as each type must be engineered for the specific application.

Oil Lubricants

NHBB
Code
Brand
Name
Type Military
Specification
Operating
Temp Max.
General
Comments
LO1 Windsor Lube
L-245X
Diester MIL-PRF-6085 -65 — 300°F General purpose instrument oil, low volatility
LO2 Royco® 885 Diester MIL-PRF-6085 -65 — 250°F General purpose instrument oil, low volatility
LO71 BP Turbo Oil 2389 Diester MIL-PRF-7808 -65 — 300°F General purpose aircraft lubricant
LY115 Krytox 143AC Perfluorinated polyether   -30 — 550°F High temperature stability. Vacuum applications
LY223 Braycote® Micronic® 815Z Perfluorinated polyether   -112 — 400°F Wide temperature range. Vacuum applications
LY378 Castrol® 399 Diester MIL-PRF-7808 -65 — 300°F General purpose aircraft lubricant
LY559 Nye® Synthetic Oil 2001 Cyclopentane   -45 — 250°F Special oil for outer space & high vacuum applications

Grease Lubricants

NHBB
Code
Brand
Name
Type Military
Specification
Operating
Temp Max.
General
Comments
LG4 Aeroshell® 22 PAO/Microgel MIL-PRF-81322 -85 — 400°F Wide temperature range, good low temp. torque. Aircraft, general purpose. NLGI 2*
LG20 Beacon 325 Diester/Lithium complex   -65 — 250°F General purpose instrument grease. NLGI 2*
LG49 Aeroshell® 7 Diester/Microgel   -100 — 300 °F General purpose, low temp. torque, wide temperature range. NLGI 2*
LG68 Royco® 27 Diester/Lithium complex MIL-PRF-23827 -100 — 275 °F General purpose, low temp. torque, wide temperature range. NLGI 2*
LY17 Rheotemp® 500 Ester/Sodium complex   -65 — 350 °F High speed, high temp. specialty lube. Spindle, instrument, and aircraft bearings. NLGI 2*
LY48 Mobilgrease® 28 PAO/Organo-clay MIL-PRF-81322 -65 — 350 °F Wide temperature range, good low temp. torque. Aircraft, general purpose. NLGI 2*
LY51 Isoflex® NBU15 Ester/Barium complex   -40 — 265 °F High speed, spindle quality grease. NLGI 2*
LY101 Krytox® 240AC Perfluorinated/PTFE MIL-PRF-27617 Type III -30 — 550 °F High temperature stability, wide temperature range. Vacuum applications. NLGI 2*
LY308 Braycote® 601 EF Perfluorinated/PTFE   -112 — 400 °F Wide temperature range. Vacuum applications. NLGI 2*
LY548 Rheolube® 2000 Cyclopentane/Sodium complex   -45 — 250 °F Special grease for outer space & high vacuum applications
LY660 Polyrex® EM Mineral/Polyurea   -20 — 350 °F Electric motor grease. Good high temperature grease. NLGI 2*
LY669 Rheolube® 374-C PAO/Lithium complex   -40 — 300 °F Channeling type grease, high speed. Good for vertical applications. NLGI 4*
LY703 Rheolube® 374-A PAO/Lithium complex   -40 — 300 °F General purpose grease. Good speed/temperature range. NLGI 2*
LY706 Kluberquiet® BQH 72-102 Ester/Polyurea   -45 — 350 °F Quiet running, wide temperature range. NLGI 2*

*National Lubricating Grease Institute—number refers to grease thickness.

Registered Trademarks

Aeroshell® – Royal Dutch Shell Plc.
Brayco® Micronic®, Castrol® – Castrol Limited.
Isoflex®, Kluberquiet® – Klüber Lubrication, a company of the Freudenberg Group.
Krytox® – DuPont de Nemours, Inc.
Mobilgrease®, Polyrex® – Exxon Mobil Corporation.
Royco® – Anderol Company.
Nye®, Rheotemp®, Rheolube® – Nye Lubricants, Inc.