soba boring head

soba boring head

This topic has 4 replies, 4 voices, and was last updated 7 February 2017 at 19:03 by JasonB.

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7 February 2017 at 17:53 #282917
Jeff Hyams 2
Participant
@jeffhyams2
I have a Soba 40mm boring head, does anyone know how to

zero-ise the Vernier scale
Advert

7 February 2017 at 17:53 #18404
Jeff Hyams 2
Participant
@jeffhyams2
how to adjust scale
7 February 2017 at 18:31 #282924
HOWARDT
Participant
@howardt
I stand to be corrected, but I don't think you can. The dial is merely a nut on a adjusting screw. Most if not all boring heads work in the same way. There are numerous home made designs including one in ME last year if you need to see how they are adjusted.
7 February 2017 at 19:01 #282935
not done it yet
Participant
@notdoneityet
HOWARDT is correct. No vernier scale on these items (might be on very large, high quality boring heads). Scale simply shows fractions of the screw thread pitch advanced each turn. They may be in metric (tenths/hundredths) or imperial (any increment).
7 February 2017 at 19:03 #282936
JasonB
Moderator
@jasonb
I have a 50mm Soba and as Haward T says the scale is engraved directly into the head of the feed screw so can't be reset. Never found it to be a problem.

If you do want to "zero" it then make a mark on the head opposite the "0", bit of tipex on the head and then a light scriber line will leave a mark in the tipex

J
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