Myford ML7 Cross Slide Leadscrew
Thrust Bearing Modification

A simple mod. to the Myford ML7 which will:

Eliminate any backlash between the cross slide and the leadscrew,

Eliminate wear in the cross slide end plate,

Reduce operational friction.

Materials required:

2x NTA411 Needle Roller Thrust Bearings

1x R168ZZ Single Row Ball Bearing
(Total cost £9.50 +P&P)

Note: Before ordering, please check the end of your leadscrew where the bearings fit is actually 0.25".

The drawing MYF001 shows the work to be carried out on the cross slide end plate:

Boring the hole from 0.25" to 0.375" to take the R168ZZ bearing

Machining of both front and rear faces for clearance of the NTA411 needle roller thrust bearings.

The photo shows a simple set-up on the lathe for boring out the hole and turning the front face. The actual dimensions may vary for your machine but the objective is to turn the front face so there is
sufficient clearance between the dial and end plate with the thrust bearing sandwiched between the two.

The rear face can be reduced with a 3/4" spot face cutter or milled. Again, the dimension is not critical so long as there is enough (and not too much!) thread left on the leadscrew to securely lock the ball handle in place.

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