I posted these in hole layout 101 here are a few valuable layout tools
Then drill with a thin drill bit like 1/16 this will follow the punch mark. then with a spot drill . the a pilot drill and finish drill .
Hope this helps.
for bolt circles I like a 6 hole cirlce it so happens that the radius of the circle and the cord distance between holes is the same. Uese the humble diver to lay out.
or you can use the above method to lay out after converting from polar to rectangular coordinates. This can be done with math or consulting the machinery handbook.
Hope this helps
tin
And guys there is still room in the tool box so feel free to add to the box.
I would suggest an "Interapid type" indicator like L.M.S #3709. Way more versatile and easier to use than a dovetail style. Or you can spend $180 for an Interapid. Doubt that its that much better but most shops want you to have an Interapid.
I began the getting started in model engineering thread a long time ago . It has grown and it is well read. I also did a thread on lathe selection . But since I often get the cart before the horse and overlook the obvious I am stating this thread. Please please help with this one .
So here is the concept . we are going to set up machinist tools box suitable for the home shop machinist .
so here are the guidelines : place a tool into this virtual tool box.
(1) Limit one tool per thread . Three tools per person. Something that comes as a set is considered one tool.
(2) This must be a tool you have in your shop and use, like and would recommend to a friend.
(3) Post a photo of the tool. your photo or link to manufacturers or sellers web site. give credit for the photo if not yours.
(4)list price and availabity as much as possible.
(5) explain the tool ,its uses and what you like and limitations. Tell us why you think this is a must have tool for the tool box.
(6) the focus here is filling the virtual tool box but you may post something that does not fit in the box.
(7) I hope this to be a fun and educational experience for all.
Tin
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