Does anyone have experience with M8 x .35 and M7 x .35 threads? I need to cut internal threads in a lens holder for lenses that have the above mentioned threads. Do you know where I can find a tap for these threads?
they are correct. it is a fine thread that controls focus on a cell phone camera sized lens. I've found an adapter to let me use the M8x.35 lens, but I'm still looking for the M7x.35 tap.
the feingewinde section seems to reference the ISO metric fine thread. I just received a response from a toolmaker that they have M8x.35 and M7x.35 taps (for >$100 at qty 1 with pretty good volume discounts)
do you happen to know which standard covers such super fine pitch threads?
DIN 13 T2 Fine Threads. M7 x 0.35 is third choice.
M7 x 0.35- 4H Internal Threads min out. dia.7.000, min. pitch dia. 6.773, max pitch dia 6.833. Min. minor dia 6.621, max minor 6.684.
M7 x 0.35- 4h External Threads max out. dia. 7.000, min. out. dia 6.947, max pitch dia. 6.773, min. pitch dia 6.728. Minor dia. max. 6.571, min. 6.513.
M7 x 0.35- 6g External Thread max out. dia 6.981, min. out. dia 6.896, max pitch dia. 6.754, min. pitch dia. 6.683, Minor dia. max 6.552, min 6.468
Hi CAD,
The one place that responded to me with availability is North American Tool Corporation (contact info below). Apparently, they sell only to industrial distributors, but they offer to put you in touch with one in your area if you don't already have one.
I have never used them before.
North American Tool Corporation
215 Elmwood Ave
PO Box 116
South Beloit, IL 61080
P: 800-872-8277 815-389-2300
F: 800-872-3299 815-389-2952