Backlash 101

Christopher Nook by Christopher Nook

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Anti Backlash Nut

Backlash (lash) is the relative axial clearance between a screw and nut without rotation of the screw or nut. Lash will always increase with use. Helix has developed several unique ways to reduce or remove the lash between the screw and nut.

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Backlash (lash) is the relative axial clearance between a screw and nut without rotation of the screw or nut. Lash will always increase with use. Helix has developed several unique ways to reduce or remove the lash between the screw and nut

 

For screw diameters of 5/8 inch, PowerAc™ No-Lash Flange is identical to a standard flange except for the slotted mounting holes. The backlash can be removed by using a nut with PowerAc™ No-Lash Flange in combination with a standard nut and flange. By rotating the slotted PowerAc™ No-Lash Flange and nut relative to the other, the thread in the second nut advances until the lash is reduced.

As the nuts wear and backlash increases, loosen the mounting bolts and readjust the PowerAc™ No-Lash Flange and nut until the lash is minimized.

Helix PowerAc Assembly with Black Plastic Nut and Bronze Nut

For a completed PowerAc™ No-Lash Flange assembly order: two standard nuts, one standard flange, and one No-Lash Flange. For example, a ¾” – 2 assembly will require the following:

            2 – 20072 Standard Nuts

            1 – 70262 Standard Flange

            1 – 73262 No-Lash Flange

A Word of Caution

When the uncompensated lash is equal to or greater than times the pitch, the assembly should be replaced.

Have a question that's not answered here? Call us. Our number is 1-855-435-4958. You can also reach out by email at sales@helixlinear.com. For additional reading, check out these related posts on our blog: