stitching chisel tooth spacing uneven??

[thekid77]

Hello leatherworker fam,

I make wallets and like to create my patterns on 8 line per inch grid paper (makes it easy to lay out stitching/make the stitching holes land where I want them to)...

My issue is that this has never been a problem, as the chisel (Tandy Diamond) points match the lines on 8 line per inch grid paper exactly (see 8 spi photo)...

I purchased a 9 spi chisel (different brand) a while back, and the tips of the points do not match the lines on a 9 line per inch grid at all (see 9 spi photo)...

I am at a bit of a loss for what to do....if I can't work on a grid I can't reliably lay out the holes for stitching, straddling t slots, etc....

The Tandy chisel lines up to the grid perfectly, but the tool makes huge holes, and the angle of the holes is extremely flat....

For those of you that use stitching chisels, are the teeth evenly spaced between each other?

I am at a total loss for what to do...

[fredk]

Draw a grid to suit the 9 point spi ?

[thekid77]

hi Fred, that actually is a 9 point spi grid - the tines on the chisel do not line up to it....

that's the issue that I'm having unfortunately

[tsunkasapa]

It is probably metric.

[fredk]

1 hour ago, fredk said:

Draw a grid to suit the 9 point spi ?

Draw a grid to match the 9 spi chisels that you have

[mdawson]

17 hours ago, tsunkasapa said:

It is probably metric.

Looks like it's a 3mm spacing.

[Leescustomleather]

The chisel has 10 tines not nine that is your problem

[thekid77]

thanks everyone for the help....i realized that my issue was that I had always laid my patterns out on an 8 spi grid, which works because inches divide evenly into eighths......not so w 3mm.....

so I just needed to work on a 3mm grid.....now everything lines up perfectly...

again, thank you so much for your help, everyone who took time to read and reply....I appreciate it!!