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Thread: Challenge 2020 - 2021 Simplicity
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18th January 2021, 10:13 AM #301
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18th January 2021 10:13 AM # ADSGoogle Adsense Advertisement
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18th January 2021, 10:22 AM #302
I got a knurling tool with the accessories I purchased at the same time i got my metal lathe.
Mine is a different design, the two knurling wheels being a short space apart and pushed together into the workpiece by advancing the toolpost.
I have used it a few times to make knobs for some tools. It turned out to be much easier to use than I thought after a few youtubes.
I agre with what Ian said about support from the tailstock and/or as close to the chuck as possible.
I found it knurls better on brass without any lubricant.I'm doing my May Challenge - I may or may not give a #*c&
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18th January 2021, 01:28 PM #303
Pask Makes has a mandraulic knurling tool:
And the knurling wheels in various pitches & pattern are available cheaply from Aliexpress, eg:
2PCS 19 x 8mm Knurl Wheel Tool Diagonal Coarse Twill Pattern 0.8mm Pitch Roller|Hob| - AliExpressNothing succeeds like a budgie without a beak.
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18th January 2021, 06:32 PM #304
Yeah, I think it's probably obligatory when knurling steel but brass works ok "dry" for me - it's said to be "self-lubricating". I have tried using fluid & it mixed with the powdery swarf the wheels produce& clogged the teeth & made a helluva mess. I may have had the wrong mix of fluid, or something, but that experience put me off & I decided to go back to what works.
Good luck! All the 'rope' wheels I've seen were home-made and although some blokes have managed it with cobbled-up gear, making a good wheel looks a bit beyond my equipment & ability. This mob have convex wheels, and some old thumbscrews do have concave knurling, but it's the concave ones we ned to make a "rope" knurl. I'd be keen to get my little mitts on one, so if you manage to find a suitable wheel at something less than an eye-watering price, let us know, 'cos I'd dearly like to be able make rope-knurled thumbscrews too!
CheersIW
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30th January 2021, 03:22 PM #305
Well as we have all been saying progress is progress know matter how small.
An my first knurling ,too.
Pretty happy with Body’s first bit of bling.
Lever cap screw done approximately 26.5 mm diameter with a M8.1.25 thread.
Centre as a Steel insert because I could so I did.
Cheers Matt.
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30th January 2021, 04:09 PM #306
That looks awesome and a nice reflection of the tool wall [emoji16]
Sent from my SM-G950F using Tapatalk
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30th January 2021, 04:42 PM #307
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30th January 2021, 05:10 PM #308
Challenge 2020 - 2021 Simplicity
I just saw the reflection my self,[emoji6]Ckelt well done,
Paul I’m bearing bad news it’s only Mild steel,With an interference fit(Read that as 8 Oz ball pein hammer.
Cheers Matt.
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30th January 2021, 05:15 PM #309
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30th January 2021, 06:11 PM #310
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30th January 2021, 08:53 PM #311
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30th January 2021, 11:05 PM #312
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31st January 2021, 09:29 AM #313
I think the general "technical term" is an "interference fit", but any of the above will draw the picture.....
I would've put a very slight taper on the stud/bolt, but that can be tricky to pull off - if you don't get the taper just so, the stud will jam part way in & about the only way to get it out is to drill it out.... damhik! Brass-in-brass tapered pins lock amazingly well, I use them sometimes for fixing bridges or other cross-pieces in small planes. ( Pretty sure the subject has come up before, in one of these build threads.)
A safe way to fit a stud in a head, if you have appropriate taps & dies is to thread the stud into the head - a drop of 'Loctite' and Bob's your auntie. At least you can get the 'regular' Loctite apart easily enough with a bit of heat. I sometimes like to use a SS stud with a brass head, just for a change. The one on the left is my "all done without a metal lathe" example, with a bit of 8mm SS bolt Loctited into the head: Knurled t_screws.jpg
Cheers,IW
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31st January 2021, 09:36 AM #314.
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I also found brass works dry with the odd blast of compressed air, but I usually use coolant, not just a dribble or a thin stream, but what's called flood coolant so that its pouring over the knurling wheels.
Matt, hate to be picky here but I notice your threads are looking a wee bit ragged? Are you used a thread cutting lube? I found it improves things quite a bit. I use something called Trefolex (a bit $$) but even something like a bit of lard is better than nothing.
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31st January 2021, 09:53 AM #315
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