Isostatic / Oil Lube

Powdered Metal Bronze Bushings Bearings-Sleeves, Flanges, and Washers and More...

National Precision Bearing is an authorized bronze bearing distributor for Isotatic, a leading provider of standard and made-to-order bronze bushings and related bearing products. Isostatic offers one of the largest selections of high quality inch and metric size bronze bearings, available for quick shipment, at competitive prices.

Key Isostatic Products

NPB offers a comprehensive selection of Isostatic Bronze Bearings and Bronze Bushings. Please view the product offer and specify bronze as an option for the Isostatic product.

Bronze Bushings and Washers
Steel-Backed PTFE Lined Bushings and Washers
Custom Cast, Sintered, & Self-lubricating Bearings
Bronze Bushings and Washers
Bronze Sleeve Bearing
Bronze Flange Bearing

Bronze Sleeve, Flange and Thrust Bearings

Oilube® Powdered Metal Bronze - SAE 841

SAE 841-copper (87-90%), tin (8-9), carbon, other elements
Powdered metal bronze providing interconnected reservoirs for oil
Vacuum impregnated with SAE 30 oil during the manufacturing process (approx. 19% by vol.)
Self-lubricating – when in motion oil rises to the surface for lubrication and restores itself when at rest
Ideal for heavy loads at moderate speeds or light loads at high speeds – max Pv 50,000, P-Load 2,000, V-SFM-1,200
Effective in temperature range of +10°F to + 175°F with standard oil
Available in oils for other temperature ranges on a made-to-order basis
Standard tolerances vary by size. See items for specific tolerances
RoHS, REACH, DFARS compliant

Century® Cast Bronze SAE 660

Cast Bronze Sleeve Bearing / Bushing
Standard stock products
SAE 660 / CA 932-copper 83%, tin 7%, lead 7%, zinc 3%
Longer length bar up to 105" available on made-to-order basis
Non-porous, highly dense grain structure for long life
Offers good hardness, strength and wear resistance; excellent anti-frictional characteristics
Tensile strength of 35,000 psi, yield strength of 27,000 psi and brinell hardness of 72
Ideal for heavy loads at moderate speeds or light loads at high speeds – max Pv 75,000, P-Load 3,000, V-SFM-750
Effective in temperature range of -450° F to + 450° F
Common mfg. specs: ASTM B505, QOC-390B Type III B144-52-3B
RoHS – exempt under annex to directive (2005/717/RC) 9b
REACH, DFARS compliant

Self-lubricating dry sliding bearing

Steel-Backed PTFE Lined Bushings and Washers
Steel-Backed PTFE Lined Sleeve Bearing
Steel-Backed PTFE Lined Flange Bearing
TU® Sleeve, Flange and Thrust Bearings
TU® Steel-Backed PTFE Lined Self-Lubricating

A steel-backed composite material comprised of:
Low carbon steel backing for extremely high load capacity-.50 – 2.7mm thick
Sintered bronze offers optimal heat dispersion –.20 - .35 mm thickness and
PTFE – lead sliding surface creates a low friction coefficient and allows for a wide temperature range – thickness .2 mm
Can be used where many liquid lubricants fail; also performs well with lubrication
Ideal for heavy loads at moderate speeds or light loads at high speeds – max Pv 102,000, P-Load 36,250, V-SFM-1,900
Effective in temperature range of -328° F to +536° F
Standard tolerances vary by size. See items for specific tolerances
See TP® product line for a lead free, REACH and ROHS compliant alternative
DFARS compliant

TP® Lead Free Sleeve, Flange and Thrust Bearings
TP® Lead Free Steel-Backed PTFE Lined Self-Lubricating

A steel-backed composite material comprised of:
Low carbon steel backing for extremely high load capacity - .50 – 2.7 mm thick
Sintered bronze offers optimal heat dispersion – .20 - .35 mm thickness and
PTFE – lead free sliding surface creates a low friction coefficient and allows for a wide temperature range – thickness .2 mm
Can be used where many liquid lubricants fail; also performs well with lubrication
Ideal for heavy loads at moderate speeds or light loads at high speeds – max Pv 102,000, P-Load 36,250, V-SFM-1,900
Effective in temperature range of -328°F to +536°F
Standard tolerances vary by size. See items for specific tolerances
RoHS, REACH, DFARS compliant

Isostatic Custom Quality Cast, Sintered, & Self-lubricating Bearings

National Precision supports the Isostatic custom bearing offer, which includes one of the world's largest inventories of bronze bearings in a wide variety of inch and metric sizes over a broad range of bearing types, from sleeve and flange to disc, plate and thrust, solid and cored bar in sintered, cast bronze and steel back-PTFE-lined materials. Their bearings can be oil impregnated, dry or graphite-filled to meet a broad range of application requirements.

NPB offers the broad range of Isostatic bronze alloy materials beyond our core powdered metal (SAE 841) and cast bronze (CA932 / SAE 660) products. A few of the other bronze alloys offered include high leaded tin bronze (CA 936 and 937), aluminum bronze (CA 614, 630, and 954), and manganese bronze (CA 863).

Isostatic custom product with the following bronze alloys:

Materials (Bronze Alloys) below are the most common alloys - call to inquire about other materials.

SAE 841 SAE 850 SAE 863
CA 220 CA 954 H.T. CA 836
CA 932 (SAE 660) CA 955 (and H.T.) CA 863
CA 936 (Modified SAE 64) CA 613 CA 903
CA 937 (SAE 64) CA 614 CA 905
CA 464 CA 624 CA 907
CA 510 CA 630 CA 927
CA 544 CA 655 CA 954