- Joined
- Sep 2, 2011
- Messages
- 1,342
- Reaction score
- 360
i need to cut a change gear for my lathe and want to purchase a set of gear cutters on ebay but i have a question and also want to make certain i am getting the correct kit or at least ill purchase a single cutter.
i need to cut a 40 tooth change gear for my chinese lathe, it measures 1.647, i believe the pa is 20. so i think what i need is a module 1, #3 with 20deg preasure angle - correct? what i dont understand is why do some list the dp and some do not? i thought dp was pretty much the depth of the cut you will make? i know the math to calculate the dp would be 40+2 / 1.647 correct? but im still a little confused about if dp is all that important on selecting gear cutters and also question "module number" is module just the size of the kit? ive seen some tiny ones that easily fit in my hand and some that looked like they would cut gears for a battle ship, so bigger the module = bigger the size?
thanks for any help
werowance
i need to cut a 40 tooth change gear for my chinese lathe, it measures 1.647, i believe the pa is 20. so i think what i need is a module 1, #3 with 20deg preasure angle - correct? what i dont understand is why do some list the dp and some do not? i thought dp was pretty much the depth of the cut you will make? i know the math to calculate the dp would be 40+2 / 1.647 correct? but im still a little confused about if dp is all that important on selecting gear cutters and also question "module number" is module just the size of the kit? ive seen some tiny ones that easily fit in my hand and some that looked like they would cut gears for a battle ship, so bigger the module = bigger the size?
thanks for any help
werowance