A linear shaft is a straight, precision machined bar on which linear bearings run to create a linear guide system to support or guide the movement of equipment in a linear fashion. Available in hardened steel, hardened stainless, 303 and 316 stainless, and aluminium. We can also manufacture on short lead times linear shafts to your drawing with custom machining, keyways, circlips grooves, drilled and tapped holes and more.
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.
Hardened steel and corrosion resistant steel linear shafting stocked in lengths of 3m.
L1770 - Hardened steel shafts
For use with linear bearings.
Ø6 to Ø60
L1771 - Hardened hollow shafts
For use with linear bearings. Hollowed for lighter weight.
Ø12 to Ø50
L1772 - Hardened Stainless shafts
For use with linear bearings Anti-corrosion.
Ø6 to Ø60
L1773 - Stainless 303 shafts
Soft stainless, high anti-corrosion.
Not for use with ball bush linear bearings.
Ø6 to Ø60
L1774 - Stainless 316 shafts
Soft stainless, very high anti-corrosion.
Not for use with ball bushing linear bearings.
Ø6 to Ø60
L1778 - Aluminium shafts
Light weight, non-magnetic.
Ø10 to Ø50
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|
This year has seen an exceptional increase in demand for us here at Automotion and we are excited to announce are moving to a larger factory early next year! This will greatly increase our manufacturing and stockholding capabilities to meet your needs from mid Q1 of 2019.
In the meantime however we continue to do our best to meet the high demand of orders we continue to receive and advise the following:
• Parts that are currently out of stock will be unlikely to ship before Christmas
• We are doing our best to ship in stock items, however any new orders from Wednesday 19th December will not be shipped prior to Christmas
• In exceptional cases we can ship very urgent orders at our discretion
We thank you for your understanding and look forward to your continued business in the new year.
The Automotion Sales Team