Nope, no Dobermans, though am looking forward to getting a dog once I’m retired (they don’t allow dogs at work).
For 2 days I’ve been chasing a 0.020" error in my X-Axis. After all the preaching you think I’d first check the SET SCREW!!! Well, it wasn’t so much loose, as fatigued after 2 years of cutting metal.
The point of the set screw had a nice flat on it allowing (only on a load) to slip. In the picture you can see the small dimple from my drilling check (fool me once).
This fixture is two fold. It’ll hold the watch cover still while I engrave the outside and inside as well as a holding fixture to deepen the counterbores another 0.010".
PS I’m also working on my Spotting surface technique
That spotting technique is cool.
My dad told me about that, once.
I believe one way was to use a wooden dowel and pollish.
How was yours done?
Nice to see that old style being used.
Really great work.
Great work Rich! what type of machining coolant are you using in the bath? I have been reviewing the feeds and speeds calculation to machine 4140. I have a old lawn tractor that they don’t make parts for so I might need to machine a spur gear for the transmission. Any thoughts? Have a great day!
I’ve machines lots of 4140/4150…and will be working with some in a week or two. My recommendation is to machine it in the annealed (soft) state and then heat treat it to the desired hardness. I know not everyone has this capability (ability). If you need to work within the hard condition…umm, well good luck. Possible? Sure, but it will be a lot slower and tougher on the machine/cutters
Coolant (Amazon)? See the photo. I mix it 10:1.
My material (unfortunately) is already hard, so I will be annealing it, machining it, then rehardening it (tempering it too of course), but that’s the way I roll.
Yea that was my plan to machine it in the annealed state. Thanks for the coolant recommendation.