TimkenLL52549/LL52510Tapered Roller Bearing Cone and Cup Set – 0.8750 in Bore, 1.6563 in Outside Diameter, 0.4400 in Assembled Width, Open, 2 Pcs

Product Description

What this part is

Timken LL52549/LL52510 single-row inch tapered roller bearing, supplied as a matched cone and cup. Cone Part Number: LL52549. Cup Part Number: LL52510. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Design Units: Imperial. Bore Diameter: 0.8750 in (22.225 mm). Outside Diameter: 1.6563 in (42.070 mm). Overall Width (T): 0.4400 in (11.176 mm). Cone Width: 0.4400 in (11.176 mm). Cup Width: 0.3400 in (8.636 mm). Series: LL52500. Bearing Material: Case-Carburized Steel. Harmonization Code: 8482.20.00. GTIN: 0053893657820.

Decoding the designation

LL — Timken’s prefix for the extra-light inch section, giving the thinnest cross-section in the range for a given bore.

52549 — the cone number, on a 0.8750 in bore.

52510 — the cup number Timken pairs with the LL52549 cone, giving a 1.6563 in outside diameter.

Precision Class: Not specified. Timken marks Class 3 with an explicit –3, *3 or #3 and Class 2 with an explicit –2; neither marking is carried here.

What these specs mean in practice

Dynamic Load Rating (C1): 16,600 N (3,730 lbf). Dynamic Radial Load Rating (C90): 4,300 N (966 lbf). Dynamic Axial Rating (Ca90): 2,920 N (655 lbf). Static Load Rating (C0): 16,800 N (3,770 lbf).

K Factor: 1.47. A K factor of 1.47 sits in the steeper group, so the bearing takes a larger thrust share for a given radial load than a 1.9-class taper of the same envelope.

e Factor: 0.40. Y Factor: 1.51. These load-zone factors convert a combined radial and thrust load into an equivalent radial load for life calculation.

The extra-light LL section puts a 0.8750 in bore inside a 1.6563 in outside diameter and a 0.4400 in assembled width, which is what makes this size useful where the housing bore is the limiting dimension.

Item weight: 0.100 kg (0.1 lb).

Mounting data

Effective Center Location: –0.07 in (–1.8 mm), measured inside the cone backface.

Max Shaft Fillet Radius: 0.050 in (1.270 mm). Max Housing Fillet Radius: 0.050 in (1.27 mm).

Shaft Backing Shoulder Diameter, frontface (da): 1.00 in (25.5 mm). Shaft Backing Shoulder Diameter, backface (db): 1.08 in (27.5 mm).

Housing Backing Shoulder Diameter, frontface (Da): 1.59 in (40.39 mm). Housing Backing Shoulder Diameter, backface (Db): 1.44 in (36.58 mm).

Quantity and configuration

Cone and cup, 2 Pcs. Unit Quantity: 2 Pcs. The LL52549 cone carries the inner race, the roller set and the cage; the LL52510 cup is the outer race. Timken catalogues the pair as one TS single-row assembly.

Interchange guidance

LL52549 and LL52510 are standard inch tapered roller numbers and the same digits are carried across the trade. Equivalent designations: SKF LL52549/LL52510, FAG K-LL52549-LL52510, NSK LL52549/LL52510, NTN 4T-LL52549/LL52510, Koyo LL52549/LL52510, Fersa LL52549/LL52510, BCA/Bower LL52549/LL52510, PEER LL52549/LL52510.

MPN Variants: LL52549/LL52510, LL52549-LL52510, LL 52549 LL 52510, LL52549 LL52510.