Overview
Bellows are protective covers shielding machine guideways, ball screws, and shafts from chips, coolant, and debris. These accordion-style covers extend and compress with machine movement while maintaining a sealed barrier. Proper bellows protection extends component life and reduces downtime from contamination.
Types and Features
Folded bellows use coated fabrics in accordion pleats with excellent compression ratios for most CNC machines. Telescopic steel bellows use interlocking segments for superior protection against heavy chips and hot swarf. Rolled bellows feature spiral construction for rotating shafts and high-speed spindle applications.
How to Choose
Measure the travel length and area dimensions needing protection. Consider exposure to oils, coolants, and chip types. For sharp chips, choose steel or reinforced fabric. For high-speed use, prioritize lightweight materials. Verify dimensions match machine travel limits with adequate margin at both extremes.
Replacement and Installation
Power down the machine and position for maximum access. Remove fasteners at both ends noting orientation. Install the new bellows aligned with mounting surfaces and secure with original fasteners. Test by cycling the axis through complete travel observing for smooth operation.
Maintenance Tips
Inspect regularly for tears and fold separation. Clean debris weekly with compressed air. Replace immediately if any breach is detected. Apply protectant to fabric bellows periodically and check mounting hardware for vibration loosening.
