OEM Replacement Guide for Tungsten Carbide Bushings

Replacing tungsten carbide bushings is a key task for OEMs that run pumps, compressors, motors, or rotating equipment.

A correct replacement process ensures stable performance, low downtime, and long service life.

This guide explains how OEMs can evaluate old bushings, select the right replacements, and work with suppliers to ensure accuracy and quality.

When OEMs Should Consider Replacing Tungsten Carbide Bushings

Tungsten carbide bushings are known for high 경도 and long life, but they still wear with time. OEMs need to replace bushings before they cause major equipment problems.

1). Common situations that require replacement:

Visible wear marks or scratches on the inner or outer surface
Loss of roundness, causing vibration or noise
Surface cracks, chips, or impact damage
Unexpected leakage in pumps or mechanical seals
Increased shaft friction or overheating
Corrosion or chemical attack in harsh fluids

2). Warning Signs Table

상태	Cause	Impact
Scratches / Wear grooves	Abrasive fluid or poor lubrication	Higher friction, faster wear
Loss of roundness	Uneven load or misalignment	Vibration and noise
Cracks or chips	Shock load or poor installation	Risk of sudden failure

How to Collect Accurate Replacement Specifications

Accurate measurements are critical when ordering replacement bushings. Incorrect sizes lead to vibration, shaft wear, or early failure.

1). What OEM engineers should measure:

Inner diameter (ID)
Outer diameter (OD)
길이
Chamfer size and angle
Groove details (if any)
Roundness and concentricity
Fit class (clearance or interference)

2). Tools Needed

마이크로미터
Bore gauge
Vernier caliper
CMM (optional for high-precision projects)

Specification Data Table

매개변수	일반적인 값	노트
ID / OD	±0.005–0.02 mm	Critical for correct fit
Surface Roughness	Ra ≤ 0.2 µm	Lower for sealing parts
Roundness	≤0.01 mm	Helps reduce vibration

Choosing the Right Tungsten Carbide Grade

Different operating conditions require different carbide grades. OEMs must choose the correct combination of grain size and binder metal.

1). Factors that influence grade selection

Fluid type (clean water, slurry, chemicals, oil)
Shaft speed and load
온도
Corrosion environment
Expected lifetime

2). Common Grade Options

WC-Co (6–12%) — best general-purpose choice
Submicron WC — higher 경도 for abrasive media
WC-Ni — good for corrosive fluids
Binderless WC — chemical-resistant but costly

Fit, Clearance, and Installation Requirements

Even the best bushing will fail if installed incorrectly. OEMs must confirm correct fit class and installation method.

1). Typical Fits

Clearance fit — easy rotation, used in pumps
Interference fit — strong grip, used in high-load equipment

2). Clearance Guidelines Table

Shaft Size	Recommended Clearance	노트
10–30 mm	0.015–0.03 mm	General pump use
30–60 mm	0.02–0.05 mm	High-load systems
60–120 mm	0.03–0.07 mm	Large rotating units

Documentation, QC Reports, and Supplier Support

A good replacement program relies on strong supplier support and documentation.

1). Important QC documents for OEM replacement

Dimensional report
경도 test
밀도 report
Ultrasonic test results
Material test certificate (MTC)
Surface roughness report

2). Why documentation matters

It helps OEMs:

Verify accuracy
Track material quality
Reduce installation risk
Maintain long-term equipment reliability

Working With Suppliers to Ensure Long-Term Replacement Success

Strong supplier communication is essential for OEM replacement cycles.

1). What a strong supplier offers

Engineering feedback on drawing errors
Suggestions for improving bushing life
Alternatives for corrosive fluids or high loads
Short lead time for urgent replacements
Stable long-term production planning

2). Supplier Selection Table

Criteria	Strong Supplier	Weak Supplier
QC Documentation	Complete and detailed	Missing or unclear
Engineering Support	Strong drawing feedback	Little or none
Lead-Time Stability	Predictable	Often delayed

결론

OEM replacement of tungsten carbide bushings requires accurate measurement, correct grade selection, proper installation, and strong supplier support.

With the right process, OEMs can reduce downtime, improve equipment reliability, and maintain long-term performance.

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