BM283930 Drawn Cup Needle Roller Bearing 28x39x30mm Forklift Transmission Radial Needle Bearing

1. Product Overview

BM283930 is single row open drawn cup needle roller bearing, standard dimension 28mm inner bore(Fw) × 39mm outer diameter × 30mm width.
Model Code Explanation:

• BM Series: Drawn cup needle roller bearing dedicated for forklift and automotive transmission system, thin stamped integral outer shell + dense long needle rollers structure
• 28: Match shaft inner diameter 28mm; 39: Outer diameter 39mm; 30: Overall bearing width 30mm

Thin-wall stamped outer cup adopts GCr15 bearing steel after carburizing quenching, ultra-small radial section height, dense needle roller layout maximizes contact area to achieve outstanding radial load capacity. Open non-sealed through structure allows full circulation of gear oil for continuous cooling and lubrication. No inner ring design, directly matches precision hardened shaft surface as raceway, effectively reduce overall assembly volume of gearbox. Widely used in electric & diesel forklift transmission gearbox, light truck auxiliary transmission, small construction machinery hydraulic power unit, agricultural tractor gear shift assembly and all compact heavy radial load transmission components.

2. Technical Specifications

Mounting dimension drawings, forklift gearbox assembly matching guides and heavy load wear resistance test reports can be provided on customer request.

3. Core Advantages

1. Ultra-thin stamped drawn cup shell structure, occupies minimal radial installation space inside forklift gearbox, meets lightweight compact transmission design requirements.
2. Dense full-complement long needle rollers, large contact area with shaft raceway, excellent heavy radial load and impact resistance, adapt to frequent alternating pressure of forklift transmission.
3. Carburized quenched thin outer cup with good elastic interference press-fit performance, tight fixation inside gearbox housing, no loose rotation and abnormal noise after long-term operation.
4. Open through-type oil-permeable design without sealing barrier, gear oil fully circulates inside bearing, rapid heat dissipation avoids high-temperature oil carbonization and bearing ablation failure.
5. No independent inner ring design, directly uses hardened shaft surface as rolling raceway, reduces part quantity and assembly cost, simplify gearbox internal layout.
6. Unified interchangeable industry standard dimension, fully compatible with original BM283930 forklift needle bearings, direct replacement without modifying gearbox housing and shaft structure.
7. Super-finished needle roller surface, low friction coefficient, stable low-noise rotation during continuous high-frequency gear shifting.
8. Rich customizable options: Single/double lip rubber seal upgrade, stainless steel anti-corrosion material variant, OEM laser marking on outer cup, neutral export anti-rust carton packaging, extreme pressure anti-wear grease pre-filling.

4. Application Scenarios

BM283930 heavy-duty drawn cup needle roller bearing is compact high radial load spare part specially matched with 28mm shaft vehicle and industrial equipment:

• Electric/diesel forklift main transmission gearbox internal support bearing assemblies
• Light commercial truck auxiliary gearbox shift transmission rotating parts
• Mini loader, small excavator hydraulic power unit radial support units
• Farm tractor power take-off gear shift limiting bearing sets
• Printing machinery, small industrial reducer compact radial load components

Aftermarket interchangeable BM series forklift dedicated drawn cup needle roller bearing
Thin wall high load transmission bearing solution for forklift manufacturers, vehicle gearbox OEM factories and engineering machinery maintenance bulk procurement.

5. Why Choose GQZ Bearing

We have 25 years of mature professional manufacturing experience for BM series forklift dedicated drawn cup needle roller bearings including BM283930 28x39x30 gearbox models.
Our BM283930 bearings adopt unified global forklift bearing standard dimensions, consistent dynamic/static radial load parameters, GCr15 carburizing heat treatment and stamping precision standards, fully dimensionally interchangeable with mainstream original brand transmission needle bearings.
Complete OEM & ODM customized service system, supporting multi-clearance groups, sealing structure transformation, stainless steel raw material upgrade and personalized surface marking demands.
Strict pre-delivery full quality inspection workflow: GCr15 steel raw material composition and hardness test, needle roller automatic sorting screening, long-cycle gear oil alternating load rotation aging test, outer cup wall thickness tolerance full batch inspection.
Professional transmission needle bearing technical team provides one-to-one radial heavy load matching calculation, gearbox press-fit tolerance design and circulating oil lubrication maintenance guidance within 24 working hours.
Standardized drawn cup needle bearing precision production workshop provides competitive factory direct bulk wholesale price, stable long-term mass supply for global forklift, light truck and agricultural machinery spare parts purchasers.
We specialize in BM series thin-wall high-load drawn cup needle roller bearings, strict outer cup carburizing superfinishing quality control and interchangeable standard dimensions, committed to long-term stable win-win cooperation with compact heavy radial transmission equipment suppliers.

6. Quality Control

• Raw material chemical composition, hardness and carburized layer thickness inspection for GCr15 drawn cup and needle roller blanks
• Precision high-speed stamping forming processing, multiple stress relief tempering cycles, ultra-precision inner hole superfinishing grinding for drawn cup raceway surfaces
• Long needle roller high temperature overall quenching, mirror polishing and high precision automatic sorting production line
• Full-complement roller assembly gap inspection, anti-wear extreme pressure grease quantitative filling procedure
• Targeted professional performance testing: BM283930 long cycle forklift gearbox alternating load rotation aging test, oil immersion abrasive wear resistance simulation durability test, outer cup elastic deformation detection
• Comprehensive re-inspection of overall dimensional tolerance, inner bore roundness and outer cup surface smoothness before anti-rust oil coating and export moisture-proof carton packaging.

Each production batch of BM283930 bearings undergoes forklift transmission continuous cycle load simulation test to guarantee stable low-noise heavy-load radial support performance for 28mm shaft compact vehicle transmission systems.

7. Get A Quote Now

If you need BM283930 28x39x30 open drawn cup needle roller bearings for forklift gearbox manufacturing, vehicle transmission assembly and engineering machinery maintenance bulk matching, send your purchase demand directly.
Complete professional one-stop supporting services after sending inquiry:

• Formal official detailed quotation reply within 24 working hours
• One-to-one heavy radial load matching calculation, gearbox press-fit installation and circulating oil lubrication technical support provided by professional transmission needle bearing engineers
• Customized bearing performance upgrade options including C3 enlarged clearance group and single-side contact sealing transformation
• Favorable factory direct bulk wholesale price for large quantity single model orders of BM283930

Please provide purchase quantity, actual working conditions (frequent gear shift alternating load / gear oil immersion / limited narrow radial installation space environment) to obtain complete official quotation documents.

8. FAQ