d - 55 mm

D - 120 mm

B - 29 mm

d₁ - - 70.5 mm

D₁ - - 97.8 mm

a - 61 mm

h - 8.1 mm

b - 6.5 mm

r₀ - 1 mm

r_1,2 - min. - 2 mm

d_a - min. - 66 mm

D_a - max. - 109 mm

r_a - max. - 2 mm

Basic dynamic load rating - C - 137 kN

Basic static load rating - C₀ - 118 kN

Fatigue load limit - P_u - 5 kN

Reference speed - 7000 r/min

Limiting speed - 10000 r/min

Calculation factor - k_a - 1.1

Calculation factor - e - 0.95

Calculation factor - X - 0.6

Calculation factor - Y₀ - 0.58

Calculation factor - Y₁ - 0.66

Calculation factor - Y₂ - 1.07

Mass bearing - 1.75 kg

• Model Number: QJ 311 N2MA
• Inner Diameter：120mm Outer Diameter：55mm Width：29mm
• Type：Angular Contact Ball Bearings
• Update date：2025-12-14
• Application:hardware,Insect Count,root canal filling,electrocardiograph,car and accessories,screen filter,medical equipment,Gear grinding machine,construction machinery and equipment,Processing machinery,cooling system
• Similar models:SKF BAHB311413A NACHI 7311CDB SNR 7311BGM NACHI 7311DF SKF BAHB311443B SKF 3311A NACHI 7311DB SNR 7311BA CX 7311B-UX NACHI 7311B
• BEARING POWER International Trading Co.,Ltd. specialize in QJ311N2MA products，there is large inventory of SKF QJ 311 N2MA . We has been built up long-term cooperation with SKF company, could make a bulk order of the QJ 311 N2MA Which SKF QJ311N2MA 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
  23052-K-MB-W33+AH3052	260	400	104	NKE	Spherical Roller Bearings
  23938 KCW33+H3938	190	260	52	CX	Spherical Roller Bearings
  AST650 F405030	40	50		AST	Plain Bearings
  51184 M	420	500	65	ISB	Thrust Ball Bearings
  7300DT	10	35	11	NTN	Angular Contact Ball Bearings
  75TAD20	75	115	48	NACHI	Thrust Ball Bearings
  AST090 10050	100	105		AST	Plain Bearings
  C2218M	90	160	40	MPZ	Spherical Roller Bearings
  FJ-2526	25	32	26	NSK	Needle Roller Bearings
  GE160DO-2RS	160	230	105	ISO	Plain Bearings
  Q244	220	400	65	ISO	Angular Contact Ball Bearings
  L217849/L217813	88,9	127	20,638	Timken	Tapered Roller Bearings
  S7024 CE/P4A	120	180	28	SKF	Angular Contact Ball Bearings
  SAPFL207-20	31.75		36,5	KOYO	Bearing Units
  SS 6306-2RS	30	72	19	ISB	Deep Groove Ball Bearings
  TA 5025 Z	50	62	25	IKO	Needle Roller Bearings
  WB1938152	18,961	38,1	162,4	ISB	Deep Groove Ball Bearings
  NU-18/560	560	680	56	CONSOLIDATED	CYLINDRICAL ROLLER BEARINGS
  AH-2334x160	170	160		CONSOLIDATED	WITHDRAWAL SLEEVES
  HC71909TGP/4	45	68	12	CONSOLIDATED	ANGULAR CONTACT BALL BEARINGS