Crossed Roller Rails from Automotion
Crossed roller rails, or crossed roller bearings are low profile, high precision rail sets that help support and guide equipment with high loads in a linear fashion with high accuracy, high repeatability, and low friction. Also available in V roller guides with V shaped needle roller cages for even high loads in the same footprint, or with Anti friction coated rails to negate the need for roller cages for particularly harsh or dirty environments.
As specialists in linear motion systems we offer you a choice of materials and sizes. So whether you need lightweight aluminium rails for use in aviation applications or stainless steel components for when exposure to water or corrosive chemicals is a factor, our knowledgable technical engineers are always on hand to provide assistance.
Make sure you download a free Linear Motion Handbook here and utilise our free CAD to help you save time planning your projects.
Supplied in sets of 4 rails. Alloy steel rail and roller. Stainless roller retainer.
Supplied in sets of 4 rails. Stainless rail and rollers.
Supplied in sets of 4 rails. Designed for high acceleration applications.
Normally supplied in set of 2 (one M and one V) with needle rollers.
Anti-Friction coated rails. Medium load capacity.
Crossed roller linear cage. Supplied in plastic or steel cage.
Linear Cage. Can also be supplied with corrosion resistant stainless balls.
Supplied in max 1 metre lengths. See technical pages for load ratings.
Installation
Important notes:
Inaccurate assembly
Inaccurate assembly or machining of surfaces will lead to low accuracy and cage creep which affects system reliability and life.
Cage creep
High speeds or off -set loads, high levels of vibration can cause cage creep.
End screws
These function to prevent the cage falling out. They are not designed as end stops. If this is required it should be designed into your system.
Ensure structure is rigid and machined accurately
- Assemble rails 2 and 3
- Check for run-out and parallelism
- Install rails 3 and 4 without tightening screws
- Install cages and end pieces
- Slide the moving part to end of the travel to allow the centering of the cage
- Tighten the preload screws to eliminate clearance
- Tighten the retaining screws
- Ensure the extended end stops are hit before the cage hits the screws or end piece
Installation surfaces
All burrs, dents, dust, etc. on the table and base need to be reduced.
Pre-load adjustment; too much preload can cause damage & reduced life. We recommend to used no or a small amount of pre-load.
Adjusting screw
Clamp
Taper block
Assembly process
1. Apply a low viscosity oil on contact surface, fix rail (1,2 & 3) lightly.
5. Move the table to one end and adjust pre-load screw slightly.
2. Temporarily fix the rail in adjusted side (4)
6. Move table to the other end and repeat.
3. Disassemble end screw from one end, and carefully insert roller retainer to nearly the centre of the rail.
Replace the end screw.
Slowly move table back and forth to the rail end, and adjust roller retainer position to rail centre.
7. Return the table back to centre and lock the preload adjusting screw slightly. Adjust the clearance of table to zero. For fi nal adjustment of preload, set correct torque value with a torque wrench and prepare to lock the rail fixing screw.
4. Fix gauges both in centre and the side of the table.
8. Finally surely lock the rail.
0 : Loading on to pre-load adjusting screw
X : Loading off to pre-load adjusting screw
Product Selection
Standard cross roller rail sets
L1000 & L1001
- Seven rail profiles (Sizes 1-12)
- Lengths: 20mm to 1 metre
- L1000 standard rail set
- L1001 corrosion resistant rail sets
Deep groove and anti-creep rail sets
L1002 + L1003
- 3 x load capacity of standard rail sets (due to deep V groove)
- Two rail profiles (Sizes 4 & 6)
- Lengths 50mm to 400mm
- Anti-creep versions for high acceleration applications
Needle roller rail sets
L1004
- Heavy load ratings and needle rollers are used
- Five rail profile size
- Lengths: 200mm to 1.2 metres
Anti-friction coated rail sets
L1005 & L1006
- Same profile as needle roller rails but contact face Teflon coated.
- Ideal for harsh, dirty conditions
- Vibration damping characteristics
