Linear ball bearings - for use on hardened linear shafting. Automotion have a huge range of standard closed linear ball bushings for shaft diameters from 5mm to 60mm.
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 request a free Linear Motion Handbook here and utilise our free CAD to help you save time planning your projects.
Stainless steel Closed linear ball bushings (for shafts 8mm to 25mm). Double compliment.
Stainless steel circular flange linear ball bushings (for shafts 6mm to 25mm). Double compliment.
Linear carriages closed, aluminium body with stainless steel linear bushing (for shafts 8mm to 25mm).
Linear carriages open, aluminium body with stainless steel linear bushing (for shafts 16mm to 25mm).
Stainless steel (AISI 303) linear shafting. Soft shafting for use with ceramic bearings.
Stainless steel (AISI 316) linear shafting. Soft shafting for use with ceramic bearings.
As well as standard cut to length shafting, Automotion can offer many specials including imperial shafts, different tolerances and non-standard diameters.
We can also machine shafts to your requirements so if you have a specific requirement, please contact our Sales team. Below are examples of just some of the machining we can do to shafting on a quick turnaround.
Our linear bushing systems are designed to have full interchangeability, with other manufacturers’ parts. For shafting see part numbers L1770 to L1785.
The single body retainer guides 4-6 ball circuits. It precisely guides the balls with a smooth motion.
Normal fit is standard, pressed fit is for without clearance.
|Part no.||Normal fit||Pressed fit|
|L1706 to L1733||H7||K6, J6|
|L1706...-1 to L1733...-1||H7||J7|
The hardened and precisely ground outer sleeve is made of bearing steel.
Consists of light aluminium case and L1706 type linear bushing, so the installation can be finished simply by bolting. Longer life can be obtained by adjusting the orientation of the ball circuits in the linear carriage element against the direction of load.
Tolerance of shaft
|Part no.||Normal fit||Tight fit|
|L1706 to L1733||h6||k6|
|L1706...-1 to L1733...-1||f6, g6||h6|
The basic dynamic load rating is defined as the constant load both in direction and magnitude under which a group of identical linear bushings are individually operated. 90% of the units can travel 50Km without failing due to rolling contact fatigue.
If a linear bushing is subject to an excessive load or impact, a permanent deformation occurs between the raceway and the rolling element. The basic static load rating is defined as the static load that gives a prescribed constant contact stress at the centre of the contact area between the rolling element and raceway receiving the maximum load.
Superball linear ball bushings
Higher load ratings
The uniquely designed ball plate (in the outside diameter of the bushing), is made of hardened steel. The precision ground groove is slightly larger than the ball size, which provides greater contact area between the balls and the ball plate, and as a result, provides 3 x higher load ratings of conventional linear bushings.
The ball plate has a convex shape to provide a pivot point at the centre which allows self-alignment up to ±0.5°. This self-alignment capability eliminates any possibility of edge pressure caused by inaccurate machining, errors on mounting, or shaft deflection.
Tolerance of shaft and housing bore
|Part no.||Shaft Ø d1||Tol. h6 μ||Housing bore Ø d2||Tol. H7 μ|
|L1740.010||10||+0 to - 9||19||+21 to -0|
|L1740.012||12||+0 to - 11||22||+21 to -0|
|L1740.016||16||+0 to - 11||26||+21 to -0|
|L1740.020||20||+0 to - 13||32||+25 to -0|
|L1740.025||25||+0 to - 13||40||+25 to -0|
|L1740.030||30||+0 to - 13||47||+25 to -0|
|L1740.040||40||+0 to - 16||62||+30 to -0|
|L1740.050||50||+0 to - 16||75||+30 to -0|
We are pleased to say our products have never been so popular; we are experiencing unprecedented levels of demand.
Unfortunately our normal levels of customer service and timescales for despatch are being impacted. We are making every effort to bring despatch times back to normal levels, and would ask you to bear with us while we integrate and train new staff.
Currently despatch of in-stock parts are running at 48 to 72 hours from receipt of order - if you do have goods requiring most urgent delivery, we would ask you to contact us with your express requirements and we will do our best to accomodate your requirements.
Many thanks for your continued business