GearHeads Forum

I have collected a few theory papers for the screw shape off the web.
The maths for the screw shapes is ... a bit intimidating. Yes, I could program the curve, but HEAVY! Roots are much simpler, but limited for pressure.

Hum - moving on to scroll compressors ... the maths is simpler.

Cheers
Roger ...

According to Wikipedia, the problem with Roots Blowers (for my needs) is that they are more high volume /low pressure. I need 5 or 6 bar, and I don't think a Roots can do that? But I don't know.

Cheers
Roger

A Roots Blower ...
Now there's an idea! Much simpler. But do you have the equations for the impellors?
I wonder how noisy the sync gears would be at full RPM?

Cheers
Roger

I have the same unit.
I THINK if you jiggle the Shift key 7 times Windows will ask you if you want it to be 'sticky'. This is fo people with disabilities. This might work.

Cheers
Roger

My piston compressor is very noisy, and has to run a lot when I am machining with air blast and pulsed mist. I want a quiet compressor - but with adequate pressure and flow.

A screw compressor would be nice, but they tend to be larger than a big piston compressor, and they also tend to be ...

In the end, I found that a 2011 aluminium taper inside a 2011 or 6061 aluminium pulley on a steel shaft did not need a key of any sort. Once the taper has been done up tightly, you need a hammer to break it loose. All very successful.

I will have to make a good gear-puller to get them back off the ...

SDP-SI have an excellent screed on tooth belt dimensions.
For GT2 the rules are as follows:
A toothed pulley with N teeth has a pitch circle diameter (PD) of 2.00*N. (The pitch on the belts is 2.00 mm)
The radial distance between the PD circle and the Outside Diameter (OD) circle of the pulley is 0 ...

I tried putting a keyway into the taperlock, but that meant drilling or broaching a 1 - 1.5 mm hole down the boundary between taperlock and pulley at the taper angle for maybe 10 mm. That was ... difficult.

The single nut works very well imho.

Yeah, I understand about your more 'senior' members ...

Zip file received. Interesting article (and issue), for which my thanks.

Ah, model engine enthusiasts, and the smell of nitro ... (or ether+olive oil)

However, about half the article has to be devoted to explaining how to get +4.0 degree and -4.0 degree tapers on a manual lathe, with the admission ...

Not wanting to blow my own horn but I published an article on how to make taper lock bushings in issue # 11 of Model Engine Builder magazine. This type of mount for flywheels is frequently used (and made) by Model Engineers.
So many magazines, so little time. Thank you.

Tapers are always a bit ...