NJ217-E-XL-M1 85x150x28mm Single Row Cylindrical Roller Bearing

1. Product Overview

NJ217-E-XL-M1 is single row cylindrical roller bearing with metric dimension 85×150×28mm. NJ structure features double fixed ribs on outer ring and single rib on inner ring, realizing one-way axial shaft positioning while allowing slight axial sliding on the opposite side. E stands for logarithmic crowned rollers to eliminate edge pressure under heavy load; XL refers to upgraded internal geometry for improved load rating; M1 represents solid machined brass cage for stable roller guidance at high speed. Inner ring, outer ring and roller-cage assembly are separable for easy split mounting and disassembly. It bears ultra-heavy radial load and limited one-way axial thrust, low friction and stable high-speed performance, widely matched for heavy industrial gearboxes, large driving motors, air compressors, metallurgical equipment and agricultural heavy machinery.

2. Technical Specifications

3. Core Advantages

• NJ single inner rib structure achieves accurate one-way axial positioning, reserve small axial float to absorb thermal expansion of long shafts
• E logarithmic crowned rollers evenly disperse contact stress, reduce heat generation and prevent roller edge peeling under impact heavy load
• XL optimized internal geometry raises dynamic & static load capacity, extends service life under continuous alternating heavy load
• M1 integral machined brass cage firmly holds rollers, resistant to high speed, vibration and medium-high temperature working conditions
• Separable inner/outer rings simplify split assembly and maintenance of gearbox and motor split housings
• Excellent rigid radial bearing capacity, stable operation under shock, vibration and long-term heavy-duty cycles
• Custom options: C3 loose clearance, high-temperature anti-oxidation grease, P5 precision grade, outer ring laser marking

4. Application Scenarios

• Industrial transmission: Heavy-duty speed reducers, main drive gearboxes, metallurgical rolling mill auxiliary shafts
• Power equipment: Large industrial driving motors, generator rotor supports, high-power cooling fan spindles
• Fluid machinery: Screw air compressors, heavy hydraulic pumps, industrial large blowers
• Metallurgical machinery: Continuous casting equipment, light rolling mill rotating assemblies
• Agricultural equipment: Large tractor heavy gearboxes, grain processing heavy drive spindles

Fit OEM assembly and aftermarket replacement of high radial load, single-direction locating industrial rotating equipment.

5. Why Choose GQZ Bearing

25 years professional manufacturer of NJ series cylindrical roller bearings. Adopt high-purity vacuum smelting GCr15 bearing steel with complete quenching and tempering heat treatment, outstanding anti-fatigue and impact resistance under long-term heavy radial load. Full OEM & ODM customization support for clearance grade, precision class, cage material and special high-temperature lubricants. Complete strict inspection workflow: raw material hardness test, CNC ultra-precision raceway mirror superfinishing, crowned roller precision sorting and high-speed rotation aging test. 24-hour professional technical support for split shaft fit tolerance and gearbox circulating lubrication scheme design. Factory direct bulk price, sufficient NJ217-E-XL-M1 bearing spot stock for global gearbox, motor and metallurgical equipment manufacturers.

6. Quality Control

1. Raw material chemical composition and hardness inspection
2. Integral quenching and stress relief tempering to eliminate internal residual stress
3. CNC ultra-precision inner and outer ring raceway mirror superfinishing
4. Logarithmic crowned roller processing, precision sorting and solid brass cage machining forming
5. Dust-free assembly pre-filled with high-speed anti-wear mechanical grease
6. Continuous rotation aging and heavy radial load cycle wear resistance testing
7. Full dimensional inspection, anti-rust oil coating, neutral moisture-proof export carton packaging

Each batch passes rotation smoothness and temperature rise test to guarantee stable long-term heavy-load one-way locating operation for industrial transmission equipment.

7. Get A Quote

Send inquiries for NJ217-E-XL-M1 single row cylindrical roller bearings used on heavy gearboxes, large industrial motors and air compressors.
Available services:

1. Standard formal quotation document delivered within 24 working hours
2. Technical guidance for split shaft fit tolerance and gearbox lubrication layout
3. Upgrade options: P5 high precision grade, C3 loose clearance, high-temperature synthetic grease
4. Competitive factory bulk unit price for large quantity orders

Please state order quantity, operating load, rotating speed and working environment to receive complete quotation documents.

8. FAQ