Timken39581/39521Tapered Roller Bearing Cone and Cup Set – 2.2500 in Bore, 4.4375 in OD, 1.1876 in Width, Inch Series 39500

Product Description

What this part is:

Timken 39581/39521 is an inch single-row tapered roller bearing set: one 39581 cone (inner ring with rollers) and one 39521 cup (outer ring). Bore 2.2500 in (57.150 mm), outside diameter 4.4375 in (112.713 mm), overall width 1.1876 in (30.165 mm). Unit Quantity: 2 Pcs (one cone, one cup).

Decoding the designation:

39581 — Timken cone (inner ring with rollers), 2.2500 in bore, 39500 series.

39521 — Timken cup (outer ring), 4.4375 in outside diameter.

Specifications:

Bore Diameter: 2.2500 in (57.150 mm). Outside Diameter: 4.4375 in (112.713 mm). Overall Width: 1.1876 in (30.165 mm). Inner Ring Width B: 1.1875 in (30.163 mm). Outer Ring Width C: 0.9375 in (23.813 mm). Number Of Rows: 1. Rolling Elements: Tapered Roller. Bore Type: Straight. Dynamic Radial Load Rating C1 (1 million revolutions): 167,000 N (37,500 lbf). Dynamic Radial Load Rating C90 (90 million revolutions): 43,300 N (9,730 lbf). Dynamic Axial Rating Ca90: 25,100 N (5,650 lbf). Static Radial Load Rating C0: 224,000 N (50,300 lbf). e Factor: 0.34. K Factor: 1.72. Y Factor: 1.77. Item Weight: 1.40 kg (3.00 lb). Series: 39500. Base Number: 39581.

Dimensions and mounting:

Effective Center Location: -0.26 in (-6.6 mm), inside the cone backface. Max Shaft Fillet Radius: 0.310 in (7.900 mm). Max Housing Fillet Radius: 0.03 in (0.76 mm). Shaft Backing Shoulder Diameter, frontface (da): 2.60 in (66 mm). Shaft Backing Shoulder Diameter, backface (db): 3.19 in (81 mm). Housing Backing Shoulder Diameter, frontface (Da): 4.25 in (107.95 mm). Housing Backing Shoulder Diameter, backface (Db): 4.06 in (103.12 mm). Cage Location relative to backface (Aa): 0.05 in (1.3 mm). Cage Location relative to frontface (Ab): 0.13 in (3.3 mm). G1 Factor: 84.3. G2 Factor: 23.7. Geometry Factor Cg: 0.107.

Compatibility and replacement:

Cross-references: SKF 39581/39521; FAG K-39581-39521; NSK 39581/39521; NTN 4T-39581/39521; Koyo 39581/39521; Fersa 39581/39521; BCA/Bower 39581/39521. Related size: Timken 39590A/39521 uses the same 39521 cup and 4.4375 in outside diameter on a 2.6240 in bore. Also written 39581-39521 and 39581 39521.

Frequently asked questions:

What are the dimensions of the Timken 39581/39521?

Bore is 2.2500 in (57.150 mm), outside diameter 4.4375 in (112.713 mm), overall width 1.1876 in (30.165 mm).

What does the set include?

One 39581 cone and one 39521 cup, Unit Quantity 2 Pcs.

What are the load ratings of the 39581/39521?

Dynamic radial rating C1 is 167,000 N (37,500 lbf) at 1 million revolutions. Static radial rating C0 is 224,000 N (50,300 lbf).