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Needle Roller Bearing
Created with Pixso. MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race

Brand Name: GQZ /OEM
Model Number: MR88N+MI72N
MOQ: 1 PCS
Price: USD 80 to 100
Delivery Time: 3-5 working days
Payment Terms: T/T,Western Union,MoneyGram
Detail Information
Place of Origin:
China
Certification:
ISO9001:2015
Feature:
Outer Ring With Centralized Lubrication Groove & Oil Hole
Inner Diameter(d):
114.3mm
Clearance:
C3
Number Of Row:
Single Row
Width(B):
63.5mm
Bearing Model:
MR88N+MI72N
Material:
52100 Chrome Bearing Steel
Seals Type:
Metal Shield (2ZR)
Application:
Motors, Fans, Conveyors, Agricultural Machinery, General Industrial Equipment
Outer Diameter(D):
177.8mm
Structure:
Separable (Outer Roller Unit + Separate Inner Ring)
Type:
Heavy Duty Caged Needle Roller Bearing
Packaging Details:
in individual packing box
Supply Ability:
100000 Sets per month
Product Description
MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 0

Product Overview
  • MR88N+MI72N is a heavy-duty separable inch-size needle roller bearing assembly from MR series. MR88N refers to the outer ring & needle roller-cage unit without inner race; MI72N is the matched separate inner ring. Only assembled together can they form a complete working bearing unit. The outer ring features built-in lubrication groove and oil hole for convenient re-lubrication. Made of high-quality bearing steel, this unit delivers outstanding radial load capacity, widely adopted for heavy-load low-to-medium speed industrial equipment as replacement for McGill Cagerol bearings.

*Send inquiry to get latest factory price and technical datasheet for MR88N+MI72N needle roller bearing.

Key Specifications
Item Spec
Complete Model MR88N + MI72N
Bore d 114.3 mm (4.5")
Outer Diameter D 177.8 mm (7")
Width 63.5 mm
Type Heavy Duty Caged Needle Roller Bearing
Structure Separable (Outer roller unit + separate inner ring)
Material 52100 Chrome bearing steel
Dynamic load Cr 70200 lb ≈ 312 kN
Static load C0r 169800 lb ≈ 755 kN
Feature Outer ring with centralized lubrication groove & oil hole
Main Features
  • Separable structure: MR88N roller assembly and MI72N inner ring can be mounted separately for easy installation.
  • Ultra-high radial load capacity, ideal for heavy-duty working conditions.
  • Outer ring equipped with annular lubrication groove and oil hole to maintain stable lubrication.
  • Precision machined raceways and needle rollers for low friction and long service life.
  • Standard inch dimension, perfect interchange for original MR series bearing.
  • Open-type design, suitable for centralized lubrication systems.

Typical Applications
  • Construction machinery & off-highway equipment
  • Mining machinery and heavy gearboxes
  • Agricultural heavy-duty machinery
  • Hydraulic equipment and industrial transmission devices
  • Steel processing machinery
  • General heavy engineering machinery

*Contact our technical team to confirm compatibility and bearing assembly suggestions.

Why Choose GQZ Bearing
  • Strict raw material inspection, adopt high grade chrome bearing steel to guarantee hardness and wear resistance.
  • Precision grinding process ensures accurate dimension and interchangeability with original equipment.
  • Complete stock for MR series inch needle bearings, support sample testing and bulk wholesale.
  • Professional technical support for bearing selection and assembly guidance.
  • Accept OEM service, laser marking and customized packaging according to customer requirements.

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 1

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 2

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 3

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 4

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 5

MR88N+MI72N Heavy Duty Needle Roller Bearing 114.3×177.8×63.5mm MR88N Assembly With MI72N Inner Race 6

FAQ

Q1: Are MR88N and MI72N two independent usable bearings?

A1: No. MR88N is only the outer ring & needle roller assembly without inner race; MI72N is the matched inner ring. They must be used together as one complete bearing unit. Separate parts cannot operate normally.

Q2: What are the dimensions of MR88N+MI72N?

A2: Bore 114.3 mm (4.5"), Outer Diameter 177.8 mm (7"), Width 63.5 mm (2.5").

Q3: Can this bearing work at high speed?

A3: It is designed for heavy radial load, recommended for low and medium speed operation.

Q4: Does this bearing support re-lubrication?

A4: Yes. The outer ring has built-in lubrication groove and oil hole for periodic grease replenishment.

Q5: Is interchangeability available with McGill original MR88N/MI72N?

A5: Yes, our GQZ bearing maintains standard inch dimensions for direct replacement.

*Place bulk orders for MR series inch needle bearings, enjoy sufficient stock and fast delivery.