What is a servo press?

A servo press uses servo motors for precise force and position control during forming operations.

How do I calculate servo press tonnage?

Use our free tonnage calculator at servopress.club/tonnage-calculator.html

Servo Press Gib Liner Replacement: Step-by-Step Procedure

admin

Gib liner replacement is one of the most impactful maintenance tasks on a servo press.

When to Replace:
- Slide-to-gib clearance exceeds manufacturer spec (typically 0.03-0.08mm)
- Visible scoring or galling on liner surface
- Increased slide vibration at speed
- Part springback becoming inconsistent

Procedure:
1. Lock out / tag out - engage mechanical safety block, verify zero energy state
2. Measure existing clearance - record all four gib positions before disassembly
3. Remove gib adjusting screws - note torque values and shim thicknesses
4. Extract liner - most are retained by screws or press-fit; do not pry against the slide surface
5. Clean gib ways - remove all old lubricant, inspect for scoring
6. Fit new liner - apply Prussian blue, check contact pattern (aim for >70% contact area)
7. Adjust clearance - set to lower end of spec; liners will bed in over first 50k strokes
8. Verify parallelism after adjustment

After replacement, run 500 strokes at 30% speed before returning to production. New liners running hot indicates insufficient clearance.

dave_toolmaker

On gib liner material: for high-SPM applications above 60 SPM, consider filled PTFE composite liners instead of bronze. They run cooler because the PTFE is self-lubricating, which matters when the slide is cycling fast and generating more friction heat. We switched from bronze to composite on our connector stamping press running at 80 SPM and gib temperature dropped 15 degrees C. Liner life went from 14 months to 26 months.

dave_toolmaker

When replacing gib liners, always replace all four at once even if only one is worn. Mixing old and new liners creates uneven clearance that causes the slide to cock. The cost difference between replacing one liner ($800) and all four ($3,200) is nothing compared to the part quality issues from mismatched liners.