D Series Ball Transfer Units
The D series covers the heavier bolt-down and stud-mount bodies in the ball transfer range, designed to be fixed rigidly into a steel plate or frame and left there. Where a pressed cup is a surface fitting, a D unit becomes part of the structure.
D Series models we manufacture

Flange Mount Fine Machined Ball Transfer Unit D-24H
Load Capacity: 600kgs
Flange Mount Fine Machined Ball Transfer Unit D-16H
Load Capacity: 300kgs
Flange Mount Fine Machined Ball Transfer Unit D-12HR
Load Capacity: 300kgs
Stud Mount Fine Machined Ball Transfer Unit D-12HAR
Load Capacity: 250kgs
Stud Mount Fine Machined Ball Transfer Unit D-12HA
Load Capacity: 250kgs
Flange Mount Fine Machined Ball Transfer Unit D-12H
Load Capacity: 300kgs
Flange Mount Fine Machined Ball Transfer Unit D-10H
Load Capacity: 200kgs
Stud Mound Fine Machined Ball Transfer Unit D-8HN
Load Capacity: 100kgs
Flange Mount Fine Machined Ball Transfer Unit D-8HA
Load Capacity: 100kgs
Stud Mound Fine Machined Ball Transfer Unit D-8H
Load Capacity: 100kgs
Stud Mound Fine Machined Ball Transfer Unit D-6HT
Load Capacity: 40kgs
Stud Mound Fine Machined Ball Transfer Unit D-6HR
Load Capacity: 50kgs
Stud Mound Fine Machined Ball Transfer Unit D-6H
Load Capacity: 40kgs
Stud Mound Fine Machined Ball Transfer Unit D-5HT
Load Capacity: 16kgs
Stud Mound Fine Machined Ball Transfer Unit D-5HR
Load Capacity: 16kgs
Stud Mound Fine Machined Ball Transfer Unit D-5HC
Load Capacity: 16kgs
Stud Mound Fine Machined Ball Transfer Unit D-5H
Load Capacity: 15kgs
Stud Mound Fine Machined Ball Transfer Unit D-4H
Load Capacity: 8kgs
Stud Mound Fine Machined Ball Transfer Unit D-3H
Load Capacity: 7kgs
Stud Mount Fine Machined Ball Transfer Unit D-2H
Load Capacity: 5kgsThe problem this group solves
Bolt-down units are used when vibration or lateral force would work a pressed unit loose — typically on moving machinery, tilting tables or anything a forklift reaches into.
How to choose
Check the plate thickness and the thread reach before selecting a stud length; a stud that bottoms out will hold the housing off the plate and destroy the load rating.
Typical applications
- Tilting and lift tables where the unit must not migrate
- Transfer decks on mobile and vibrating equipment
- Heavy pallet and container handling plates
- Structural ball beds built into welded frames
Frequently Asked Questions
How is a D series unit fixed?
Through the plate from underneath, with a threaded stud or bolt holes in the base, so the housing is clamped rather than pressed.
What torque should be used on the fixing?
Torque depends on the stud size and plate material, so we supply the thread and stud dimensions with the drawing rather than a blanket figure.
Need d series quoted?
Send the model numbers and quantities; we reply with price, lead time and drawings.







