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Machining a double lead, 11 pitch Acme thread out of a bronze alloy using a Proto Trak SLX CNC lathe.
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.
18 maj 2017 · The charts below display the information for all common UN/Metric threads as well as the lead and lead angle for double and triple start versions of each thread. The lead angle represented in the chart is a function of a thread’s lead and major diameter as seen in the equation above.
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.
17 sty 2022 · Here's a quick how-to for cutting multi-start threads, including using the threading dial, the compound, and the spindle gear. I also discuss how multi start threads are used in the...
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.
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
