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Images and technical specifications for item NU321.
PRODUCT INFORMATION
Description and selection guidance
NTN Bearing NU321 belongs to the Cylindrical Roller Bearings family. The technical tables below show the available dimensions, ratings, speeds and mounting limits for this item.
When requesting a quotation, provide the complete item number, required quantity and operating conditions so Cat Son can verify the configuration.
NU321 specifications
TECHNICAL SPECIFICATIONS
- Brand / Manufacturer
- NTN
- d - Shaft bore diameter
- 105 mm
- D - Diameter outside
- 225 mm
- B - Width
- 49 mm
- E - Upper roller diameter
- 195 mm
- F - Lower roller diameter
- 135 mm
- rs - Minimum fillet radius
- 3 mm
- r1s - Minimum fillet radius
- 3 mm
- Bearing clearance
- CN
- Weight
- 8,53 kg
PRODUCT PERFORMANCE
- C - Basic dynamic load rating
- 355 kN
- C0 - Basic static load rating
- 360 kN
- Cu - Fatigue load limit
- 37,5 kN
- N lim - Oil lubrication limiting speed
- 3700 tr/min
- N lim - Grease lubrication limiting speed
- 3100 tr/min
- Tmin - Minimum operating temperature
- -40 °C
- Tmax - Maximum operating temperature
- 120 °C
LIMITS
- da min - Minimum shoulder diameter IR
- 118 mm
- da max - Small face shoulder max diameter
- 132 mm
- db min - Min inner ring GO diameter
- 137 mm
- Da max - Maximum shoulder diameter OR
- 212 mm
- ra max - Maximum fillet radius
- 2,5 mm
- r1a - Maximum fillet radius
- 2,5 mm
NTN ITEM SUPPORT
Send the current item and operating conditions.
Cat Son can compare dimensions, design and mounting conditions before quotation.
