On Wednesday 01 July 2020 13:01:08 andy pugh wrote:
> On Wed, 1 Jul 2020 at 17:12, Gene Heskett wrote:
> > My problem is getting an accurate diameter for the bolt circle.
>
> 1) Measure the chuck hole-centres:
> Measure 1 hole with a digital caliper. Zero the caliper at the full
> diameter.
Measure from an arbitrary center to perimeter and calculate from three
points. Adjust and remeasure.
On 7/1/20 9:08 AM, Gene Heskett wrote:
Greetings all;
I had to drill a pin hole and drive this backplate with a dead blow
hammer to get it locked to this BS-1 well enough to machine a register
On Wed, 1 Jul 2020 at 17:12, Gene Heskett wrote:
> My problem is getting an accurate diameter for the bolt circle.
1) Measure the chuck hole-centres:
Measure 1 hole with a digital caliper. Zero the caliper at the full diameter.
Measure between the outsides of two holes. The offset zero will
I don't have "regular" tools for this. So I have to touch one edge.
Note the table position on the DRO. Then touch the other side and note the
position. Then finally move the table to the average of the two positions
and hope the DRO slides are accurate enough. Do all the moves from the
same
Greetings all;
I had to drill a pin hole and drive this backplate with a dead blow
hammer to get it locked to this BS-1 well enough to machine a register
shoulder, but finally got that done although I haven't tested it for fit
yet, but the chucks internal shoulder is 130.06 mm and the register
