ah man, I've been drooling to have one of those machines!

One of my friends built their own using some kind of a saw and just taking off the whole actual saw part and using the machine part+dildo

It's a great fantasy, but extremely dangerous and no one should try that at home. The speed is all wrong and if unchecked a person could burst their bladder causing almost immediate death.

FetLife has an active discussion group devoted to DIY sex machines.

Doesn't mean it's safe.

Doesn't mean it's not. You could cause bodily harm from vigorous use of a dildo or lack of lube but we're not stifling constructive discussion about sex toys or practices like fisting, although they could lead to vaginal or anal prolapse. "No one should try that at home" is a bit much.

People with mechanical expertise who know what they're doing can easily make their own sex machines at home. The FetLife discussion group, and other sources, have instructions for safe, low-powered DIY machines. Commercial products like the Fucksall and Drilldo are simple, modified power tools. If electric motors worry you, other machines are human-powered via a rocking mechanism or foot pedals.

Keep in mind that some of the commercial sex machines, sold for "novelty use" only, are just motors or motorized pistons that don't have additional mechanics to keep torque in check. Potential problems also include overheating and electrical shock; a good machine shouldn't harm the user when it breaks or needs maintenance.

Apparently, you can purchase vac-u-loc attachments for reciprocating saws.

I've actually heard about that before, and was even on a site for it one day out of curiosity, but don't even remember what site it was.

Just don't forget about leaving it attached. One day, someone could walk into your bedroom and ask why your chair has a penis.

I don't know, it could lead all sorts of interesting questions. LMAO thanks for the post (and tip) You seriously made me laugh after pulling a grueling 8 hours at work. Something that was very much needed.