Here is way of way having direct read dials on mini lathe.
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If have a 20 TPI cross feed screw.
One turn is 0.050" some most lathes have a Graduated Dial, 50 Divisions. For direct reading you need a Graduated Dial, 100 Divisions so each 0.001 on the dial takes off on the diameter 0.001. You 100 Divisions from
https://littlemachineshop.com/products/product_view.php?ProductID=6102&category=
The size could a problem it is almost? 2" diameter but easy to read.
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Now if you the metric feed screw and inch reading.
It 1mm or 0.03937" per turn
The best is Graduated Dial, 78 Divisions . Next best you can buy is Graduated Dial, 75 Divisions or each Divisions is 0.00052 or off diameter is only of by 0.00002 " . Diameter is only off by 0.00004"
The size is only larger by 0.078" easy to fit on old Dial.
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https://littlemachineshop.com/products/product_view.php?ProductID=1984&category=
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This what looking and next order I will put cart for upgrade no free shipping I wait for till large order.
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Dave
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davesmith1800