Polyurethane Spindle Liners: Improve Machining Accuracy & Reduce Vibration
Get more from your turning centre with Bonaprene’s custom-made polyurethane spindle liners. Designed to reduce bar whip, minimise vibration and dampen workshop noise, our spindle liners help create a smoother, more efficient machining process.
By reducing the clearance between the spindle bore and bar stock, they help keep material stable during rotation, allowing you to run at higher spindle speeds, improve machining accuracy and reduce cycle times.
Why Choose Bonaprene Spindle Liners?
1. Increase Machining Speeds & Reduce Cycle Times
Excessive clearance between the spindle bore and bar stock can lead to unwanted movement, bar whip and vibration, particularly at higher speeds.
Bonaprene spindle liners reduce this clearance to between 0.75mm and 1.5mm, helping to keep the bar stable as it rotates. This allows operators to increase spindle speeds, where machine and material conditions permit, without compromising machining accuracy.
The result is smoother operation, more consistent tolerances and the potential for shorter production cycle times.
2. Durable, Hardwearing Polyurethane
Made from resilient polyurethane elastomer, our spindle liners are built to withstand the demands of busy manufacturing environments.
Unlike rigid or brittle alternatives, polyurethane absorbs impact and vibration while offering excellent wear resistance. It also provides several practical benefits:
- Noise reduction: Helps dampen vibration and reduce operating noise.
- Impact resistance: Resilient enough to withstand knocks and accidental drops.
- Corrosion resistance: Won’t rust or corrode like metal alternatives.
- Long-lasting performance: Designed to withstand regular industrial use.
It’s a combination of durability and flexibility that makes polyurethane particularly well suited to spindle liner applications.
3. Smoother Feeding & Versatile Stock Handling
Keeping bar stock properly aligned with the collet is essential for smooth, reliable feeding.
Bonaprene spindle liners help guide material into position, reducing unwanted movement and the risk of stock catching or jamming during operation.
Their flexible construction also allows them to accommodate slightly bent or off-centre bar stock. Whether you’re working with round, square or hexagonal material, liners can be manufactured to suit different stock shapes and sizes.
4. Quick & Easy Changeovers
Changing spindle liners shouldn’t mean unnecessary machine downtime.
Our simple, one-piece drop-in design makes replacing liners quick and straightforward:
- Open the spindle clamp.
- Slide out the existing liner.
- Insert the replacement liner.
- Tighten the clamp and get back to work.
No complicated assembly or lengthy changeovers – just a practical design that makes life easier on the shop floor.
Why Choose Bonaprene?
At Bonaprene Products, we specialise in manufacturing high-performance polyurethane components for a wide range of industrial applications.
With extensive material knowledge and in-house manufacturing capabilities, we can produce spindle liners to suit your specific requirements, helping you get the right fit for your machinery and stock.
Whether you’re looking to reduce bar vibration, improve machining accuracy or simply make your production process more efficient, we’re here to help.
Looking for a better spindle liner solution?
Get in touch with the Bonaprene team to discuss your requirements.
Call 01978 661 478 or 07879 524395 or email tom.g.mills@bonaprene.co.uk
Please contact us on 01978 661478 should you require further information. Our Technical Sales Team will be happy to assist with your enquiry.
About Bonaprene
The UK’s leading producer of polyurethane products, we manufacture, refurbish and supply components for a wide range of uses.
