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B: Links Last updated: 25 Sep 2017 |
Primes
Not much out there on these machines, I'm afraid. If you know of any web sites with any information on this hobber, please email me.
Resources
- Division ratios, find out what divides into the number of your choice.
- Prime numbers and their relevance to gear hobbing.
- Software for calculating ratios used in gear hobbing.
- hobber_differential_2016_03_01.xlsx spreadsheet for calculating differential ratios.
Links
- Ash Gear manufacture a large variety of hobs, broaches and cutters from stock, with specials available to order.
- College Engineering Services produce a set of castings for the machine which I understand was much improved and called the "Helix". It uses iron castings for the major parts and the base.
- mwmills2 Yahoo! group has various plans for gear cutting machines including the Jacobs Hobber.
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