Brass LBC3 (JIS H5115) Bushing Bearings for Sugar Industry Applications

Reliable Solutions for Stokers, Feeders, and Conveyor Systems

Introduction

In the sugar processing industry, machinery such as stokers, feeders, conveyors, and diffusers operates under high load, low speed, and heavily contaminated conditions. Sugar dust, moisture, vibration, and intermittent lubrication place extreme demands on bearing materials.

Brass LBC3 bushings (JIS H5115) are widely used in sugar mills due to their excellent machinability, wear resistance, and stable performance under oil or grease lubrication. This article explains the typical application positions, design solutions, and material selection guidelines for LBC3 brass bushing bearings, including half bushes with back-side screws and drilled lubrication holes.

Typical Applications of Brass LBC3 Bushings in Sugar Mills

1. Stoker System Bearings

Application Positions:

• Stoker shaft supports

• Pivot points of scraper arms

• Chain guide rollers

• Throwing arm bearings

Operating Conditions:

• High radial load

• Low rotational speed

• Frequent start/stop

• Heavy contamination from sugar dust and moisture

Solution:
LBC3 brass bushings with grease holes and oil grooves provide reliable sliding performance while tolerating dirt ingress better than steel bearings.

2. Half Bushing with Back-Side Screws and Drilled Holes

Application Positions:

• Feeder shafts

• Conveyor drive shafts

• Intermediate gearbox supports

• Retrofit or maintenance-critical locations

Design Advantages:

• Easy installation without full disassembly

• Back-side screws fix the bushing securely inside the housing

• Drilled holes act as lubricant reservoirs and grease channels

Why Used in Sugar Plants:
Half bushings allow fast replacement and precise alignment, especially in areas with limited access or frequent maintenance requirements.

3. Feeder and Conveyor Shaft Bearings

Application Positions:

• Cane feeders

• Weigh feeders

• Belt and chain conveyor shafts

Solution:
Cylindrical LBC3 brass bushings with:

• Circumferential oil grooves

• Radial lubrication holes

• External grease nipples

This design ensures continuous lubrication and extended service life under abrasive conditions.

Material Properties of Brass LBC3 (JIS H5115)

Key Characteristics:

• High copper-based brass alloy

• Good wear resistance under moderate load

• Excellent machinability for custom sizes

• Good anti-seizure performance with lubrication

• High thermal conductivity for heat dissipation

Performance Benefits:

• Smooth sliding behavior

• Reduced shaft wear

• Stable operation at low to medium speeds

• Cost-effective solution for large-scale sugar mill equipment

Limitations:

• Not recommended for extreme shock loads

• Requires proper lubrication

• Not suitable for dry-running conditions

Material Selection Guide for Sugar Industry Bearings

Selection Tip:
LBC3 brass bushings are ideal where lubrication is available and cost-efficiency and machinability are important. For highly abrasive or maintenance-free applications, self-lubricating bearings may be considered.

Design Recommendations for LBC3 Brass Bushings

Lubrication Design

• Radial grease holes aligned with grease nipples

• Circumferential oil grooves

• Relief pockets at shaft shoulders

Fit & Tolerance

• Bearing OD: slip or light press fit (H7)

• Bearing ID: clearance matched to shaft speed

• Back-side screws secured with thread locking

Shaft Requirements

• Recommended shaft hardness ≥ 50 HRC

• Surface roughness Ra 0.4–0.8 μm

Maintenance Advantages in Sugar Industry Equipment

• Simple greasing schedule

• Easy inspection and replacement

• Reduced downtime

• Lower maintenance cost compared with rolling bearings

Common Problems and Solutions

Conclusion

Brass LBC3 (JIS H5115) bushing bearings are a proven and economical solution for stoker systems, feeders, conveyors, and shaft supports in the sugar industry.
With proper design, lubrication, and material selection, LBC3 bushings deliver reliable performance, long service life, and easy maintenance, making them an excellent choice for sugar mill machinery.