Our Larger Sized oldhams have been replaced with our mini oldhams.  Please check the Mini Oldham Listing for details.

After testing numerous fixturing techniques, we are pleased to be able to offer the OldHam accessories which are designed to decouple the leadscrew from the yokes on 3d printers.

Our OldHam wobblers support 16mm and 20mm hole layouts for AntiBacklash nuts.

While this was designed for the Railcore® initally, this can be used on just about any 3d printer to achieve the same result as long as the diameter of 32mm will fit! We are working on a smaller oldham as well which will be only for the 16mm a/b nuts.

This product has been long in development and we are really excited to be able to announce that they are now available.

No need to replace your yokes, or even affect your alignment, simply bolt these in between your AntiBacklash nut, and your yoke. The oldham takes care of the rest for you. We have designed these to work with both the 16mm and 20mm antibacklash nuts.

The oldhams are held together with silicone orings rated for 200C.

Note: These items ship with m3x8 cap head screws to hold on the antibacklash nut and are sold in sets of 2, 3 or 4.

Installation is really easy:

1) Remove the bed from the yokes and set it down inside the printer. (Yes you may have to clean out the bottom of the printer. :)
2) Detatch your Z Yoke from the Z slider making sure to hold on to the slider, and secure it with some masking tape so it does not slide off the rail. You do not want to repack bearings.
3) Loosen the coupler holding the leadscrew too the stepper motor.
4) Slide the leadscrew with attached Yoke and A/B Nut out of the printer.
5) Remove the orings from the oldham using the provided tool. Put each side of the T under a part of the oring that has the little round cutouts on it. Then push up and the T will push the oring off. Using fingernails can break the orings.
6) Install the oldham with thru holes to the A/B nut
7) Reassemble the oldham with the orings. You can use the tool and hook the oring on it and gently pull it up till the top of the oring holds onto the pin in the top of the oldham. Angle the tool so it is flat with the top of the oldham, and slide it out thereby seating the oring.
8) Attach the other side of the oldham to the yoke. (See the 3rd image in the photo gallery).
9) Reinstall your yoke and leadscrew into your printer.

Railcore®️ is a registered trademark of RailCore labs, LLC