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# Worm gear zi

## Worm gear zi

(OP)
I am working on a project of cutter profile for zi worm. Also referred some research paper but not getting answers please any one can help me to understand the zi profile calculation please

### RE: Worm gear zi

(OP)
I actually read that but there are not give information about zi profile cutter(how can get x,y,z coordinate for zi) and how to calculate for 2 start worm (I am new in this so I have no idea about it so pls help)

### RE: Worm gear zi

shubhm139200

what type of cutter it makes a difference.
see appendix A of agma 6022 page 10 6022-c93

### RE: Worm gear zi

#### Quote (Shubhm139200)

I actually read that but there are not give information about zi profile cutter

#### Quote (https://www.eng-tips.com/viewthread.cfm?qid=483497 spigor (Mechanical) 28 May 21 12:28)

BTW I calculate this assuming a ZI worm

### RE: Worm gear zi

(OP)
I read all previous discussion but still i not get profile for cutter can you please describe me in steps for ZI as you mention in ZN

### RE: Worm gear zi

(OP)
I'm working on whirling cutter profile for zi and in these two threads formulas are not give for calucalat zi cutter please help

### RE: Worm gear zi

Let's see what we can do. Where are you located in?

### RE: Worm gear zi

(OP)
I referr some book for basic information and also read those trends but I have some questions regarding it
1) same formula for zi,zn and zk profile?
2) how to calculate points for tool?
3) can anyone please explain me how to calculate for tool
I can share some details of zi worm
Center distance =50.80mm
Reference diameter =24.76mm
Overall diameter =32.38mm
Root diameter =15.82mm
Base diameter =9.54mm
Dedendum=4.4744mm
Axial pitch =11.969mm
Tip width=2.86mm
Normal pressure angle =20
Axial pressure angle =20.13
Transverse pressure angle =67.20

### RE: Worm gear zi

I've looked and haven't found formulas. The most I've seen is a listing of the deviation of a perfect straight line for different sized teeth and different lead angles. But they only give 3 points: beginning, end and middle.

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