Keep Your Ball Screw Support Bearings Running Smoothly

Simple Lubrication & Dust Protection Tips

Ball screw support bearings are key to smooth, precise machine movement. But if you don’t take care of them — especially with lubrication and dust protection — you’ll face breakdowns, downtime, and poor performance.

Here’s how to keep your bearings working well for longer.

Why Lubrication Matters

Good lubrication is not optional. It:

• Reduces friction – Stops metal parts from rubbing together.
• Cools the bearing – Helps avoid overheating.
• Prevents rust – Protects against moisture and corrosion.
• Keeps motion accurate – Ensures smooth, stable operation.

Choose the Right Lubricant

For Most Machines (Low to Medium Speed)

Use grease — it’s simple and effective.

• Lithium-based grease (NLGI 2) – Good for general use.
• Synthetic grease (Polyurea or Aluminum Complex) – Lasts longer, handles higher speeds.
• High-temp grease (Bentonite or Silicone-based) – For machines over 120°C.
• Heavy-duty grease (EP or MoS₂ additives) – For high-load applications.

Tip: Fill only 1/3 to 1/2 of the bearing space. Too much grease = too much heat.

For High-Speed Machines (>3000 RPM)

Use oil instead of grease for better cooling.

• Low-viscosity synthetic oils (ISO VG 32 or 46)
• Oil mist or air-oil systems – Great for clean, fast operations.

How Often to Lubricate?

It depends on speed and environment. Use this as a guide:

Watch for Warning Signs

• Too hot? If the bearing feels more than 15°C warmer than room temperature, check the lube.
• Noise? Grinding or scraping sounds usually mean poor lubrication or dirt inside.
• Leaks? Grease coming out = too much grease.

Don’t Forget: Dust is Dangerous

Dust and debris act like sandpaper inside bearings — they wear parts down fast and cause noise and failure.

Best Ways to Block Dust

Seals – First Defense

• Rubber Lip Seals: Good for slower machines (<2000 RPM). Check them regularly.
• Non-contact Seals: Better for high-speed:

     Labyrinth Seals: Use a maze-like path to block particles.

    Air Barrier Seals: Blow clean air around the shaft — good for cleanroom environments.

Cover the Ball Screw

Use bellows or telescopic covers to protect the ball screw.

• Metal armor – For heavy-duty environments (e.g., chip-heavy machine shops).
• Plastic/fabric bellows – Lighter and good for fast-moving machines.

Keep Things Clean

• Clean around bearings regularly.
• Use scrapers or shields near cutting tools to catch chips.

Enclose sensitive equipment or use filtered air where possible.

Quick Maintenance Tips

• Use quality lubricants – Don’t save money now and pay later.
• Replace old grease completely – Never mix different types.
• Check seals weekly – Replace worn or damaged ones right away.
• Adjust grease by season – Use NLGI 1 in cold weather, NLGI 3 in summer.
• Train your team – Teach them to spot leaks, feel for heat, and listen for noise.

Final Thought

Taking care of your ball screw support bearings doesn’t have to be complicated.

• Use the right lubricant for your machine.
• Keep dust out with proper seals and covers.
• Do regular checks and maintenance.

These small steps prevent big problems — saving you time, money, and headaches.

Need Help?

If you're not sure what lubricant to use or how to protect your bearings, we can help.

Contact our engineering team today for expert advice and custom solutions.