Myford ML7 Resilient Motor Mount

A flexible mount for a Compton Parkinson Motor fitted to a Myford ML7 lathe
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updated May 11, 2023

Description

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I've been refurbishing a Myford ML7 lathe which came with a 240v single phase Compton Parkinson motor.   The motor is mounted with two soft rubber rings which reduce the vibration to the lathe.

The problem is these resilient mounts can deteriorate and I could not find a supplier of the mount.  The mount is circular on the outside but a nonagon (9 sided) shape on the inside with a hard shell to dissipate the load from the clamp.

I designed and printed this one using Fiberlogy FiberFlex 30D with 2 perimeters and 15% infill.  This provided a flexible support but still supported the weight of the motor.

I printed the outer ring in Sunlu grey PETG.

Printing this mount with FiberFlex 30D is quite easy using a Prusa i3 Mk3S+, just use the Prusa Slicer profile.

I've included a picture of the mount fitted and the original on the other side (looking a bit sorry for itself after all these years).

Update: 

After fitting the mount I found the motor can swivel as PETG is quite a slippery material so I’ve redesigned a new collar which increases the contact area.  An alternative method is to use a few drops of contact adhesive where it contacts the steel band which holds the mount.

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