Nn4921 Cylindrical Roller Bearings for CNC Lathe Machine Tool Equipment

• Customization: Available
• Rolling Body: Roller Bearings
• The Number of Rows: Multi-column
• Model NO.: NN4921
• Outer Dimension: Medium and Large(120-190mm)
• Material: Bearing Steel
• Spherical: Non-Aligning Bearings
• Load Direction: Radial Bearing
• Separated: Separated
• ID: 105mm
• Od: 145mm
• B: 40mm
• Weight: 2.00kg
• Transport Package: Single Box
• Specification: NN4921
• Trademark: MONTON
• Origin: Luoyang
• HS Code: 8482500090
• Production Capacity: 1000PCS/Week

Product Description

Name	Cylindrical roller bearings
Seires	N/NJ/NU/NUP/NN/NNU/SL ect.
Brand	MONTON
Model	NN4921
d	105mm
D	145mm
B	40mm
Load rating  C	130KN
Load rating  Co	260kN
Speed Ratings	6000r/min
Ring Material	Gcr15/ GCr15SiMn/20Cr2Ni4A/20Cr2MnMoA
Cage Material	Brass cage/Steel cage
Sealed	as customer requested
Weight	2.00KG
Roller materail	Gcr15
Design Structure	Cylindrical roller
Precision	P4,P5 P6 or as customer requested
Vibration	ZV1, ZV2, ZV3, or  as customer requested
Clearance	C0, C2, C3, or  as customer requested
Quality standard	ISO9001: 2000/SGS
Package	Carton/Wooden case
Original	Luoyang
Service	OEM
Delivery date	Accordingly
Application	Large and medium-sized electric motors, locomotives and vehicles, machine tool spindles, internal combustion engines, generators, paper machines, mining machinery, gas turbines, reducers, rolling mills, vibrating screens, and lifting and transportation machinery.

Cylindrical Roller Bearings

1. Structure and Characteristics Since the rollers of the cylindrical roller bearings make line contact with the raceways, these bearings can support heavy radial loads and are suitable for high speed operation.
Assembly and disassembly are comparatively easy even if the inner or outer ring requires a shrink fit, as the bearing is a separation type.

2.Cylindrical roller bearings are classified as single row, double row and four row type, according to how many rollers are used, and there are models as shown in Table 1 to 3. Although designed as a thin wall type, the SL Model double row cylindrical roller bearing can support enormous radial and impact loads. Table 4 lists the configurations available. 
Features and benefits
High load carrying capacity
High stiffness
Accommodate axial displacement 
Low friction
Long service life
Enhanced operational reliability