Specifications
Gear Hardness
55–60 HRC (approx.)
Product Name
Auto Feed Gear Shaft Hub Assembly
Model
B-042057
Packing Size
250x50x50 mm
Gear Type
Bevel Gears & Spur Gears Integrated
Material
Alloy Steel + Brass Bush + Hardened Gear Steel
Weight Approx
1.2 Kgs
Shaft Hardness
50–58 HRC (approx.)
Shifter Type
Spring-Loaded Positive Engagement
Features:
- Complete gear shaft hub assembly with shifter mechanism
- High-strength alloy steel gears for durability
- Precision machining ensures accurate gear meshing
- Smooth and reliable auto-feed engagement
- Spring-loaded shifter for positive feed selection
- Brass bush for low-friction and long wear life
- Suitable for repair, replacement, and machine rebuilding
Description
This Automatic Feed Gear Shaft Hub Assembly (Model B-4257) is a complete feed-drive component used in vertical turret milling machines. It integrates the gear shaft, bevel gears, hub, spring-loaded shifter, and engagement mechanism to transmit motion smoothly from the drive system to the automatic longitudinal or cross feed.
Made with hardened alloy steel and brass bush components, it ensures long service life, stable torque transmission, and precise feed engagement.
Applications:
- Auto-feed transmission in vertical milling machines
- Feed control for longitudinal / cross feed systems
- Replacement for worn or damaged feed gear shafts
- Machine maintenance workshops
- Milling machine rebuilding and retrofitting
Compatibility:
- Bridgeport-type Vertical Milling Machines
- Ram-Turret Milling Machines (Chinese, Taiwanese, Indian models)
- Compatible with machines using B-4257 feed gearbox design
- Works with most standard M1TR / vertical turret milling machine feed units

