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Thank you all. You've helped me tremendously! As a result we've contracted the job outside from a gear maker. In the future however I will attempt to cut some gears in hose - those gears that require no accuracy. Tbuelna - I had to go with a profile shift to avoid heavy tooth undercut in the...

Not sure how to use a "rack shaped" cutter on a 3-axis vertical CNC mill. The gear to be cut was meant to be fixed in a horizontal rotary table (gear axis horizontal along X). The rotary table is fixed to the mill's workable so the only place to attach a cutter to is the spindle. Can't really...

Thank you Gearcutter. By Single Cutter I did mean what you call a fly-cutter type tool. Our gear cutting tool supplier calls them Single Cutters (may look up: Single Cutter gear cutting tools). It looks like a slitting saw blade but with a gear groove profile instead. I would not be able to...

Cannot find answers to my dilemma anywhere: can I use a single cutter tool to cut a gear with an X profile shift? I believe a single cutter would shift the entire involute which is not what the X shift is about. I think in the case of the X shift, it is the Major and Minor that shift while the...

Thank you everyone. I knew I could count on you! Thanks to you, it is all clear to me now. My main problem was not knowing that I can shift profile of each gear independently. I thought that shifting profile of one gear requires a very speciffic shifting of profile of the other gear. And no...

Thanks Ibmakem, I see that you are shifting gear profile in one gear only as oppose to shifting profile in both gears. I did no know that this is acceptable. Will gears mesh correctly? Any major adverse effects? Thanks again for your help.

Need help in determining spur gear parameters. I believe the manufacturer used correction P but that's over my head (I can analyze gears with correction P-0 only). Gears come from the valve train of a tiny engine used in a Try-Bilt leaf blower which I am converting to a model plane engine. So...

I talked to Ikona rep. Their tooth profile may be the answer. I've seen things before that did not deliver on their promises, so I'm going to wait till I can test it. There is however some merits to their claims so I am hopeful it's gonna work. What concerns me is the efficiency that's somehow...

I just called Ikona. The number is no longer in service. They may be out of business.

No I can't use a clutch. It's a special mechanism with components that must be rigidly connected between each other. The only "lose connection" is this backlash. I'll call Ikona in a moment and will let you know what they say. It could be what I am looking for if it works for larger gear ratios...

If done the way described earlier (opposite bevel gears) - it should be zero backlash forever as spring will compensate for wear (pushing axially).

Thanks Plasgears. This is very encouraging. To answer Spurs: yes it is possible too install a spring with sufficient stiffness. The problem always is to install a spring that can produce huge force but has sufficien SOFTENESS. The stiffer the spring the easier it is to design and package it...

Thank you Terry; Unfortunately I can not use any other gear arrangement but the one I described. This gear arrangement is the main component of a special type of rotary compressor (so called cat and mouse design). It allows acceleration and deceleration of vanes - several times per revolution...

Thanks Terry, you are correct in your assumtions: external involute, side fit, 30deg, the root is flat but should make no difference, and 65.0 mm (2.559") major is needed. If DP needs to be 23.8237 than may X shift factor calulation should be correct, and X = 0.210 for shifting the 24 DP. So I...

Thank you Mike, I dont have room for additional idlers. However, if spring loaded idlers work, that means gears can work with zero backlash. I hope tooth tips don't require special modification. I also hope the efficiency is still fine. I know of split gears with preloaded spring between halves...

I have an application that transmits large torque but requires ZERO backlash. During each gear revolution torque direction changes several times. This generates large shock loads and noise due to backlash. The gear set is internal-external gears. I intend to eliminate backlash to zero, but...

I need to use a 24/48 involute spline with 60 teeth, but need to get 65.0 mm OD (a bit larger than what you get with a standard 60T-24/48). To get the 65mm OD I need to use profile shift X - same technique as with a gear. Can anyone explain how to calculate the necessary X factor? For a gear it...