d - 55 mm

D - 120 mm

B - 29 mm

d₁ - - 75.34 mm

D₂ - - 103.7 mm

r_1,2 - min. - 2 mm

d_a - min. - 66 mm

d_a - max. - 75.2 mm

D_a - max. - 109 mm

r_a - max. - 2 mm

Basic dynamic load rating - C - 79.2 kN

Basic static load rating - C₀ - 67 kN

Fatigue load limit - P_u - 2.8 kN

Reference speed - 10000 r/min

Limiting speed - 6300 r/min

Calculation factor - k_r - 0.05

Mass bearing - 1.5 kg

• Model Number:311-Z
• Inner Diameter：120mm Outer Diameter：55mm Width：29mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-10
• Application:Low-voltage electrical equipment,Roller mill,respirator,electrocardiograph,Workpiece,chemical,auto tools,Infrared Technology,Logistics Equipment,pneumatic Pump,Generator
• Similar models:NKE 6311-2RSR NACHI UC311 KBC 6311DD Timken 311NP SNR 6311E ISO UK211+H2311 NKE 6311 CRAFT 6311ZZ NTN 6311LLBNR ISO 62311-2RS
• BEARING POWER International Trading Co.,Ltd. specialize in 311-Z products，there is large inventory of SKF 311-Z . We has been built up long-term cooperation with SKF company, could make a bulk order of the 311-Z Which SKF 311-Z 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
  22238-K-MB-W33	190	340	92	NKE	Spherical Roller Bearings
  2788A/2735X	38,1	73,025	23,812	Timken	Tapered Roller Bearings
  480KBE031	480	790	248	NACHI	Tapered Roller Bearings
  51324	120	210	70	KOYO	Thrust Ball Bearings
  6222 ZZ	110	200	38	ISO	Deep Groove Ball Bearings
  ARXJ30.1X43.8X2.8	30,150	43,800	2,800	NTN	Needle Roller Bearings
  BS 275 7P62U	75	130	25	SNFA	Thrust Ball Bearings
  GN106KRRB	34,925	80	38,1	Timken	Deep Groove Ball Bearings
  K 20x24x10	20	24		NBS	Needle Roller Bearings
  K81134-TV	170	215	14	INA	Thrust Roller Bearings
  MR105ZZ	5	10	4	ISB	Deep Groove Ball Bearings
  NA4956	280	380	100	NSK	Needle Roller Bearings
  NKJ100/40	100	130	40	Timken	Needle Roller Bearings
  NU3238	190	340	120	ISO	Cylindrical Roller Bearings
  E10	10	28	8	FAG	MAGNETO BEARINGS
  32011X	55	90	23	FAG	TAPERED ROLLER BEARINGS
  CFH-1-SB	.6250	1.0000	.6250	McGill	NEEDLE BEARINGS
  HE3134	170	220		SKF (Old No.)	ADAPTERS
  RSTO20	47		15.8	Torrington	NEEDLE BEARINGS
  SN-314..21314	70	-	90	CONSOLIDATED	PILLOW BLOCKS