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30 maj 2012 · Cutting a multi-start thread is relatively easy. Some controls have an address function to index the thread for the 2nd and any successive leads of the thread being cut, as indicated by cadcamwiz, but what works on all controls is to shift the start point of the threading tool by a distance equal to the thread lead divided by the number of starts.
20 wrz 2014 · Since it's a 2-Start thread, you need to change the lead to 2 x Pitch. When both starts are cut you get the correct pitch between starts. The rule of thumb I use with any kind of ACME or API thread is at least 4 x Lead for the run-in distance
2 paź 2017 · I can cut double-start threads by using a leadscrew with a pitch of 2mm, triple-start threads with a leadscrew of 3mm, and quad-start threads with a 4mm lead screw.
I am trying to figure out how to make an internal 3/8-4 double lead acme thread. I have tried getting help from large company's like Sandvik, Vargus, xactform, etc, but have not had any luck. The part I have to thread is around 3/4" long.
11 lip 2014 · Depending on the thread pitch and the specifics of the lathe's leadscrew, the threading dial, the screw gear, and the number of starts to be cut, you may be able to accomplish this by dividing the threading dial appropriately.
So you can cut one thread with the compound dial set at zero, then crank it along one thread pitch to cut the other one.
18 maj 2017 · A double start thread will have a lead distance double that of a single start thread of the same pitch, a triple start thread will have a lead distance three times longer than a single start thread of the same pitch, and so on. Shop Harvey Tool’s Comprehensive Offering of Fully Stocked Threadmills.
