3311 DNRCBM-Angular contact ball bearing-FGFA bearings

3311 DNRCBM Double row angular contact ball bearing with snap ring and split inner ring

Angular contact ball bearings can simultaneously accommodate radial and axial loads. They are capable of operating at high rotational speeds. The greater the contact angle, the higher the axial load capacity. High-precision and high-speed bearings typically employ a 15-degree contact angle. Under axial force, the contact angle increases.

Dimensions

d	55 mm	Bore diameter
D	120 mm	Outside diameter
B	49.2 mm	Width
d₁	≈81.55 mm	Shoulder diameter inner ring for two-piece inner ring
D₁	≈105.43 mm	Shoulder diameter outer ring
D₃	115.2 mm	Snap ring groove diameter at outer ring
D₄	129.7 mm	Outside diameter snap ring
C	4.9 mm	Distance outer ring side face - snap ring groove
b	3.1 mm	Width snap ring groove outer ring
f	2.82 mm	Width snap ring
r₀	max.0.6 mm	Snap ring groove bottom radius
r_1,2	min.2 mm	Chamfer dimension inner ring for two-piece inner ring
a	97 mm	Distance pressure point(s)

Abutment dimensions

d_a	min.66 mm	Abutment diameter shaft
r_a	max.2 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	95.6 kN
Basic static load rating	C₀	83 kN
Fatigue load limit	P_u	3.55 kN
Reference speed		6 000 r/min
Limiting speed		5 300 r/min
Calculation factor	k_r	0.095
Limiting value	e	1.14
Calculation factor	X	0.57
Calculation factor	Y₀	0.52
Calculation factor	Y₁	0.55
Calculation factor	Y₂	0.93

Tolerances: Normal, P6, P5
Internal clearance: table, drawing no

Basic Parameters

Bearing Inner Diameter：55 mm
Bearing Outer Diameter：120 mm
Bearing Thickness：49.2 mm

Wafangdian Fafuge Bearing Co., Ltd., rooted in Wafangdian Bearing Industry Base, is an emerging professional bearing manufacturer. Drawing on the base’s profound industrial heritage, we have upheld craftsmanship since inception, integrated precision manufacturing into R&D and production, and focused on the R&D and refined production of spherical roller bearings.