TimkenLL52549-3/LL52510-3Tapered Roller Bearing Cone and Cup Set – 0.8750″ Bore, 1.6563″ Outside Diameter, 0.4400″ Width, Class 3 Precision

Product Description

What this part is:

Timken LL52549 / LL52510, a complete inch-series TS tapered single bearing — one cone assembly and its matched cup. Bore Diameter: 0.8750 in (22.225 mm). Outside Diameter: 1.6563 in (42.070 mm). Overall Width: 0.4400 in (11.176 mm). Inner Ring Width (B): 0.4400 in. Outer Ring Width (C): 0.3400 in (8.636 mm). Item Weight: 0.10 kg (0.22 lb). Dynamic Load Rating: 16,600 N. Static Load Rating: 16,800 N. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Precision Class: Class 3. Unit Quantity: 1 Pc.

Decoding the designation:

LL — Timken’s inch prefix for a low-section tapered roller series, giving a shallow cross-section for a given bore.

LL52549 — the cone number. LL52510 — the matched cup number. The pair is the complete bearing.

*3 — Precision Class: Class 3 on both halves. A tighter running tolerance than standard, giving lower running vibration and closer shaft location. The same marking appears as LL52549-3/LL52510-3 and LL 52549 *3 / LL 52510 *3.

What these specs mean in practice:

e Factor: 0.4. K Factor: 1.47. Y Factor: 1.51. The K factor fixes the ratio of radial to thrust capacity, and at 1.47 this raceway angle carries heavy thrust alongside its radial load. Dynamic Axial Rating (Ca90): 2,920 N. Dynamic Radial Rating at 90 million revolutions (C90): 4,300 N. G1 Factor: 4.7. G2 Factor: 8.62. Geometry Factor (Cg): 0.0431, the constant Timken uses in its lubrication life adjustment factor.

Mounting data:

Effective Center Location: –0.07 in (–1.8 mm), measured inside the cone back face. Maximum Shaft Fillet Radius: 0.050 in (1.270 mm). Maximum Housing Fillet Radius: 0.050 in (1.27 mm). Shaft Backing Shoulder Diameter, Frontface (da): 1.00 in. Shaft Backing Shoulder Diameter, Backface (db): 1.08 in. Housing Backing Shoulder Diameter, Frontface (Da): 1.59 in. Housing Backing Shoulder Diameter, Backface (Db): 1.44 in. Cage Location relative to back face (Aa): –0.02 in. Cage Location relative to front face (Ab): 0.07 in.

Quantity and configuration:

Unit Quantity: 1 Pc. One cone assembly and its matched cup, supplied together as one complete single-row TS bearing.

Interchange guidance:

LL52549 / LL52510 is the industry designation for this bearing and is carried by SKF, Koyo, NTN as 4T-LL52549/LL52510, Fersa and BCA/Bower. Harmonization Code: 8482.20.00.