d - 241,3 mm

D - 327,025 mm

T1 - 25,4 mm

B - 52,388 mm

C - 36,512 mm

R - 6,3 mm

a - 7,6 mm

D1 - 336,448 mm

Da - 305 mm

db - 264 mm

C2 - 9,525 mm

da - 253 mm

Weight - 11,62 Kg

Basic static load rating (C0) - 1070 kN

Factor (G1) - 1050,5

Factor (G2) - 172,4

Factor (K) - 1,44

Basic dynamic load rating (C90) - 134

Basic dynamic load rating (Ca90) - 93,3

Basic dynamic load rating (C1) - 517 kN

Calculation factor (e) - 0,41

Calculation factor (Y) - 1,48

• Model Number: 8578/8520B
• Inner Diameter：241,3mm Outer Diameter：327,025mm Width：52,388mm
• Type：Tapered Roller Bearings
• Update date：2025-12-10
• Application:rubber products machinery and equipment,pneumatic Pump,plastic rolling,Low-voltage electrical equipment,Industrial equipment,switch,forklift industry,diagnostic test paper,cleaners,Broadcasting System,shoe-making machinery
• Similar models:Timken 8578/8520CD+X2S-8578 KOYO 8578/8520 Timken NP897593/NP857890 Timken 8578/8520 Timken 8578/8520B NTN T-8578/8520D+A ISO 8578/8520 NTN T-8578/8520 CX 8578/8520 Timken NP455350/NP857890
• BEARING POWER International Trading Co.,Ltd. specialize in 8578/8520B products，there is large inventory of Timken 8578/8520B . We has been built up long-term cooperation with Timken company, could make a bulk order of the 8578/8520B Which Timken 8578/8520B is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express.Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

• Model No.	Inner Diameter	Outer Diameter	Width	Brand	Type
  15118/15251D	30,213	63,5	46,038	Timken	Tapered Roller Bearings
  423138	190	320	130	NTN	Tapered Roller Bearings
  626/21-2Z	6	21	6	ZEN	Deep Groove Ball Bearings
  7018DF	90	140	24	NTN	Angular Contact Ball Bearings
  H7016C/HQ1	80	125	22	AST	Angular Contact Ball Bearings
  F61900	10	22	6	ZEN	Deep Groove Ball Bearings
  GIKL 22 PW	22	42	28	INA	Plain Bearings
  HB85 /S/NS 7CE1	85	120	18	SNFA	Angular Contact Ball Bearings
  KV7.9X11.9X7.8	7,940	11,940		NTN	Needle Roller Bearings
  MR 115 VV	5	11	4	NSK	Deep Groove Ball Bearings
  N30/530	530	780	185	ISO	Cylindrical Roller Bearings
  NCF2920 V	100	140	24	ISO	Cylindrical Roller Bearings
  NJ3207	35	72	27	ISO	Cylindrical Roller Bearings
  NUP 252	260	480	80	ISB	Cylindrical Roller Bearings
  WTPC-556	19.9100	20.5000		American	THRUST ROLLER BEARINGS
  R-12-ST	.7500	1.6250	.3125	MRC	DEEP GROOVE BALL BEARINGS
  SJ-7355-SS			1.2500	RBC	NEEDLE BEARINGS
  CSCG350	35.0000	37.0000	1.0000	INA	DEEP GROOVE BALL BEARINGS
  NUP-2064E	320	480	95	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS
  AH-24038x180	190	180		CONSOLIDATED	WITHDRAWAL SLEEVES