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This see,ms to be the approach taken by the sybian guy....Bobmi357 said:Just about any decent motor will do for this, the problem is usually the motor turns at too many rpms. So you want to reduce the rpms using some gearing. After all, a machine that produces 1500 thrusts per minute is liable to seriously injure someone.
Personally I would think anything beyond 30 thrusts per minute would be too much.
Assuming you have a motor with gearing running between 10 and 20 rpm, you could attach a wooden wheel to it and by adding an offset wooden dowl you can translate rotational motion into back and forth motion.
I've not built anything like this, but it I were, this is probably the basic approach I'd use.

ReadyOne said:This see,ms to be the approach taken by the sybian guy....
The one I linked to has a 1 1/4" stroke and the speed is adjustable from 0 to 2300 per minute, depending upon how much you pull the trigger. The blades are removable, and one could be inserted into a silicone or rubber dildo, with extreme care taken to make sure it was centered, and superglue applied to ensure seperation does not occur. or, you could modify a blade to attach in another fashion, but you get the idea.

Bobmi357 said:I've seen a clip of the sybian in action. Its noisy, damn noisy. I suspect that the sybian not only strokes, but also vibrates, which would account for the noise.
I would also suggest to anyone that does want to build their own to keep the stroke length short, only an inch or two.
This kinda bothers me. The speed of the saw would be hard to control, and at 2300 rpm you could seriously damage something. Human flesh is going to generate only so much lubricant and at higher speeds that lubricant would be totally inadequate. Even with added lubricant you could still burn it off too quickly. Thats why I suggested keeping the strokes to something slower, more realistic. Frankly I don't know too many guys capable of doing 2300 strokes a minute.![]()
MagicFingers said:You can pick one up cheap at your local junk yard.
The motion is right and the speed variable.
Use your creativity and imagination to come up with the proper attachments and mounting.
(This would be Click & Clack's choice, I'm sure!)
Bobmi357 said:Just about any decent motor will do for this, the problem is usually the motor turns at too many rpms. So you want to reduce the rpms using some gearing. After all, a machine that produces 1500 thrusts per minute is liable to seriously injure someone.
Personally I would think anything beyond 30 thrusts per minute would be too much.
Assuming you have a motor with gearing running between 10 and 20 rpm, you could attach a wooden wheel to it and by adding an offset wooden dowl you can translate rotational motion into back and forth motion.
I've not built anything like this, but it I were, this is probably the basic approach I'd use.
MagicFingers said:You can pick one up cheap at your local junk yard.
The motion is right and the speed variable.
Use your creativity and imagination to come up with the proper attachments and mounting.
(This would be Click & Clack's choice, I'm sure!)
blondie74 said:LOL! It sounds as you've put more than just a little thought into this!!