1B3950 Tapered Roller Bearings for Caterpillar Equipment

1B3950 is a tapered roller bearing used in Caterpillar wheeled tractor-scrapers. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The available fitment information identifies this bearing for the Caterpillar wheeled tractor-scraper models listed below. The product SKU is 1B3950; the corresponding part number is also written in the 1B-3950 format.

Fitment

Equipment type: Caterpillar wheeled tractor-scraper

• Caterpillar 630A
• Caterpillar 630B
• Caterpillar 631B
• Caterpillar 631C
• Caterpillar 631D
• Caterpillar 631E
• Caterpillar 637
• Caterpillar 637B
• Caterpillar 637D
• Caterpillar 637E
• Caterpillar 641
• Caterpillar 641B
• Caterpillar 651
• Caterpillar 651B
• Caterpillar 651E
• Caterpillar 657
• Caterpillar 657B
• Caterpillar 657E
• Caterpillar 666
• Caterpillar 666B

The listed models include the 630, 631, 637, 641, 651, 657 and 666 machine series. Model suffixes are part of the fitment identification and should be checked against the equipment nameplate and the bearing number before installation.

Cross-reference numbers

1B3950 and 1B-3950 identify the same bearing number in the supplied product data, with the hyphen used in the latter format.

Specifications

The stated dimensions are 7.5 cm in length, 4.3 cm in width and 7.7 cm in depth. The stated weight is 0.8 lb. The available data does not specify the bearing material, internal clearance, load rating, seal arrangement, or whether the item is supplied as an individual bearing or as part of a bearing set.