Search found 1666 matches

by tornitore45
Mon May 20, 2019 4:39 pm
Forum: General Discussion
Topic: Drill shank hardness
Replies: 18
Views: 199

Re: Drill shank hardness

Opps! You're right. Probably only works with HF drills.
If one is lucky, otherwise there is not enough Carbon in recycled soup can to harden.
Bashing HF is a popular sport but actually their tool quality has improved, still cutting tools are iffy.
by tornitore45
Mon May 20, 2019 12:13 pm
Forum: General Discussion
Topic: Drill shank hardness
Replies: 18
Views: 199

Re: Drill shank hardness

Same here. I save any hard tool steel. Tap and even dies, I made a form tool out of a broken scissor blade. Too thin to be used flat but supported with a blank worked fine.
by tornitore45
Mon May 20, 2019 11:01 am
Forum: General Discussion
Topic: Drill shank hardness
Replies: 18
Views: 199

Re: Drill shank hardness

you can fix that with a torch and bucket of water.
Not HSS. Hardening HSS is a not a process available at the typical Home Shop Guy.
I make cutting tool from broken HSS bit but the only useful part is the web which basically limit the design to small grooving tool.
by tornitore45
Mon May 20, 2019 10:26 am
Forum: General Discussion
Topic: Drill shank hardness
Replies: 18
Views: 199

Re: Drill shank hardness

Well, I saw it on the internet so it must be true. Yea.
by tornitore45
Mon May 20, 2019 9:10 am
Forum: General Discussion
Topic: Drill shank hardness
Replies: 18
Views: 199

Drill shank hardness

I was watching a guy on Utube making late tools from the shank of HSS broken drill bits. I pointed out the the shank is not hardened. He responded that in his case it is because he uses HS Conbalt. That makes no sense since an alloy element added to improve the business end of a drill has no bearing...
by tornitore45
Tue May 14, 2019 4:17 pm
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 331

Re: Hyperboloid of revolution twirler

The OP was not about drawing, printing, machining an Hyperbola. The OP was: Given the position of the stick on the twirler rotating disk, what is the equation of the Hyperbola to cut the slit so that the stick pass through? Reference to a contraption like: https://www.youtube.com/watch?v=cfrQSzDfFoI...
by tornitore45
Tue May 14, 2019 10:55 am
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 331

Re: Hyperboloid of revolution twirler

All good points but no CNC here, only dials. I was a bit lazy but being in vacation near Buffalo (I know, who would vacation in Buffalo) between the never ending rain and the cows in the pasture I got down and worked out the geometry. The slits are definitively an Hyperbole an not a Parabola, that w...
by tornitore45
Sat May 11, 2019 5:38 pm
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 331

Re: Hyperboloid of revolution twirler

I am aware of the examples.
I am looking for dimensioned plans OR an analytical way to relate the position and inclination of the revolving "stick" to the projection on the plane-on-axis where the hyperbolic slits are cut.
by tornitore45
Sat May 11, 2019 2:09 pm
Forum: Live Steam
Topic: Quieting noisy gears
Replies: 18
Views: 708

Re: Quieting noisy gears

I have the same miniature bevel gears in a PM Shaper Model. Is fundamental that the gear mesh properly and the virtual cones meet at the same point where the axis meet. Washer and/or collars to position the shafts.
by tornitore45
Sat May 11, 2019 1:55 pm
Forum: General Discussion
Topic: Hyperboloid of revolution twirler
Replies: 11
Views: 331

Hyperboloid of revolution twirler

I want to build one of these.
https://www.youtube.com/watch?v=cfrQSzDfFoI

Anybody has plans or formulas to cut the Hyperbola given the rod mounting attitude and location?
by tornitore45
Thu May 09, 2019 2:36 pm
Forum: Live Steam
Topic: Rectangular cotter holes
Replies: 9
Views: 532

Re: Rectangular cotter holes

A rectangular cotter pin with the aspect ratio shown has great strength against axial pull out of the clevis pin, yet it may be built as an hairpin with a head to keep if from falling through and made springy to stay put while easy to be compressed by hand. Flexible in one direction and strong on th...
by tornitore45
Sun May 05, 2019 5:49 am
Forum: Milling Machines
Topic: Machinist Jacks
Replies: 18
Views: 768

Re: Machinist Jacks

When clamping a piece on the end of the vice, place the jack on the other side to eliminate the twisting load.