BLKLM29748Tapered Roller Bearing Cone, 1-1/2 in. Bore, 0.7200 in. Inner Ring Width, Light-Section Imperial Inch Series

Product Description

What this part is

A single-row imperial tapered roller bearing cone in the LM29748 size — the inner ring together with its tapered rollers and cage, forming the shaft-side half of a two-piece TS single-row tapered bearing. Cone only. The matching cup is the LM29710, with the LM29711 as the second published pairing.

Decoding the designation

The number breaks into a K prefix and the base number LM29748. In Schaeffler and FAG notation the leading K identifies the part as a cone assembly rather than a complete bearing, so KLM29748 and LM29748 describe the same cone; the number is also written KLM 29748 with a space. LM is one of the inch-series prefixes in the ANSI/ABMA interchange scheme, and the base number defines the geometry across brands. The 29748 cone number pairs with the 29710 cup number inside the LM297xx block.

What these specs mean in practice

The K factor of 1.76 puts the LM29748/LM29710 in the general-purpose band, carrying a predominantly radial load with useful thrust capacity in one direction. At 0.7200 in. inner ring width on a 1-1/2 in. bore this is a light-section cone: the compact 0.5 lb ring suits trailer and agricultural hubs, small gearboxes and idler positions where package space governs. The effective centre lies 0.16 in. inside the cone backface, which shortens the effective span slightly relative to the physical mounting distance in an opposed pair.

Published ratings and mounting data

Bore (d): 1-1/2 in. (38.1 mm)
Inner ring width (B): 0.7200 in. (18.288 mm)
Dynamic radial rating C1, matched LM29748/LM29710 assembly: 10,900 lbf (48,600 N)
Dynamic radial rating C90, matched LM29748/LM29710 assembly: 2,830 lbf (12,600 N)
Dynamic thrust rating Ca90, matched assembly: 1,610 lbf (7,170 N)
Static radial rating C0, matched assembly: 13,600 lbf (60,300 N)
K factor: 1.76
Maximum shaft fillet radius: 0.14 in. (3.560 mm)
Shaft backing shoulder diameter: 1.67 in. frontface, 1.93 in. backface
Cone weight: 0.5 lb (0.20 kg)

Quantity and configuration

One cone assembly, sold individually. Single row, tapered rollers, steel cage, straight bore.

Fitting notes

The cone takes an interference fit on the shaft and is driven from the backface onto the shoulder, with the driving force carried by the inner ring rather than the cage. Endplay or preload is set after the cup is seated in the housing bore.

Interchange guidance

LM29748 interchanges directly across Timken, FAG (as KLM29748), SKF, NTN, Koyo and BL because the inch-series base number defines the geometry. The LM29749 is a related size in the same block with a different inner ring width and is a separate part.