NIce work those came out well and a great learning experience a skill I want to learn in the future.
I am curious how did you secure the blank to the arbor for cutting?
I am curious how did you secure the blank to the arbor for cutting?
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First gear cutting
- Thread starter DPittman
- Start date
Thread locker!
First off, nice job on your first gears @DPittman 
That's gotta be really satisfying!
You guys are stirring deep into the bottom of my murky to-do list pot. I've got a damaged brass helical spur gear out of an obsolete miter saw sitting here on my desk. I've been looking at it for a few years, wondering what I might do about it and biding my time until I know enough to figure out the solution without making it worse. I started by looking at gear catalogs but didn't get that far.
Since it's been there I've acquired a mill including a dividing head and this thread has started to fan the spark of "can I do that?". I still need to learn enough about gear forms and dividing heads before taking the next step but I can see another mini-project in my future......
I'll start another thread when I get the wheels turning so I don't jack yours @DPittman , thanks for the inspiration!
D
P.S. That would be one more "I fixed that using the milling machine" conversation for the "What do we do with our metal working tools" thread.
That's gotta be really satisfying!You guys are stirring deep into the bottom of my murky to-do list pot. I've got a damaged brass helical spur gear out of an obsolete miter saw sitting here on my desk. I've been looking at it for a few years, wondering what I might do about it and biding my time until I know enough to figure out the solution without making it worse. I started by looking at gear catalogs but didn't get that far.
Since it's been there I've acquired a mill including a dividing head and this thread has started to fan the spark of "can I do that?". I still need to learn enough about gear forms and dividing heads before taking the next step but I can see another mini-project in my future......
I'll start another thread when I get the wheels turning so I don't jack yours @DPittman , thanks for the inspiration!
D
P.S. That would be one more "I fixed that using the milling machine" conversation for the "What do we do with our metal working tools" thread.
Former Member
Guest
My first gear cutting experience required that I design my own cutters (sorry didn't know gear cutters existed, took me 2 months to find the book that give the calculations to design the cutter). Had a good old friend (machinist that I learned a lot from) grind the cutters. My rotary table was basically an indexer from existing gears from the Logan lathe and cut the gears on the Logan Lathe.
There is always a solution, just being open minded enough to find it is the key.
There is always a solution, just being open minded enough to find it is the key.
Well I finally wrapped up my sewing machine project.
The sewing machine is a 1936 Singer that had a clutch drive mechanism that made the sewing machine extremely difficult to "drive". It was made for experienced factory workers with a need for speed. When I got the machine the drive was non functional and bastardized anyhow. I decided that a salvaged treadmill motor would be a good fix for the drive if I could figure out how to adapt it all.
The first thing I did was make a much larger driven pulley on the machine to slow things down and then I made a drive pulley for the treadmill motor. I had to make new mounting plate/brackets, motor cover and motor speed control board covers.
The original treadmill motor speed was controlled with a potentiometer and I wanted to adapt that to use with the original foot pedal. Mistake #1.
After many failed attempts of using salvaged drill gears or belt and pulley systems to change the linear motion of the foot pedal into a partial rotary motion to control the potentiometer, I finally got it working. As seen above, I ended up cutting my own gears to achieve the right ratio. Figuring out a crankshaft mechanism of the proper stroke was most challenging.
While the sewing machine looked horrible when I got it, the mechanics of it was surprisingly smooth and incredibly well built.
I cleaned and repainted but did not spend as much effort on repainting as I may should have. I didn't bother with new decals and such as this was never going to be a show machine. I restored it to hopefully sew the odd animal harness, tractor seat cover, tool pouch etc. I won't be the operator of it but will give it to my more capable brother for that stuff.
The original hardwood table was also in very rough cosmetic shape so that just got fixed and repainted.
The sewing machine is now quite easy to operate and has great power but the soft stop and start of the treadmill motor control board takes a bit of planning and getting use to.
The sewing machine is extremely smooth running and considering it is 87 years old, it is very impressive how well made they were.
