Recent Posts

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21
How to's / Re: Circlip groove
« Last post by Joules on March 19, 2024, 02:16:25 PM »
Sounds like a good approach to getting it sorted.
22
How to's / Re: Circlip groove
« Last post by John Rudd on March 19, 2024, 01:26:15 PM »
Steel is not hardened…

I’m thinking using a broken 1/8” centre drill suitably profiled to make the groove, sharpened on my t and c grinder..
23
How to's / Re: Circlip groove
« Last post by Joules on March 19, 2024, 12:35:32 PM »
Grinding bits of Eclipse hacksaw blade, just below the teeth, if you have something that can hold it like a parting blade.  Otherwise sacrifice a small HSS drill bit in some metal stock you can hold in a toolpost. Your dodgy Dremel can part profile it, do you have diamond stones for finishing ?  Keep stick out to a minimum unless you have a pile of small drills to use.


Oh !!!  Is your silver steel part unhardened ?
24
How to's / Circlip groove
« Last post by John Rudd on March 19, 2024, 10:47:38 AM »
I need to machine a circlip groove in a 3mm silver steel shaft for some circlips.

Circlips themselves are 0.6-0.7mm thick and are 2.3mm.

So to the collective, I put it to you, what’s the best way to tackle this?

I tried an abrasive disc ( my fav method.) in my Dremellookalike but the end brg is knackered so it wobbles like a jelly….I tried Stew Harts method using a slit saw….hmmmm some erroneous noises made me abandon that idea…

Silver steel doesn’t machine like EN1a sadly….so open to suggestions please….

What works for you?
25
Project Logs / Re: Steady for Harrison
« Last post by philf on March 18, 2024, 02:17:35 PM »
Looking good!
26
Project Logs / Re: Steady for Harrison
« Last post by shipto on March 18, 2024, 01:32:07 PM »
Finally some real pictures, I have done the guide thing bit and I am sure that rigidity will not be an issue on this at least.
27
Well after a couple of weeks of nocturnal jungle drums from the A12.  I just spent a week possessed by a demon...

After four days standing on my neck, it got bored and chose to move to my ears and scream as loud as it could. And, just to make things fun , it kept moving the ground beneath my feet if I tried to stand , occasionally throwing me against walls .   

Luckily, it seems to have taken a shine to my neighbour, and has now left me alone... I hope.
28
Tools / Re: Knurling
« Last post by Joules on March 17, 2024, 08:08:59 AM »
A couple of pictures of your knurling tool in situe, showing alignment and one with a bit of stock between knurls before knurling.
29
Project Logs / Re: Steady for Harrison
« Last post by shipto on March 16, 2024, 06:41:13 PM »
As for the pins this is my first thoughts.
The end of the highlighted shaft will be threaded to secure them in place which will be set by a number of spacers I can put either side dependent on the stock I am turning. The keyway will allow me to fully tighten it without it turning.
Inside will be a sprung brass bar with a screw to set it against the stock.

I assume that the spring is just there to stop the insert falling out?

How much adjustment will you have before needing to swap spacers?
The spring will hold the pins back so the stock can be fed through without them getting in the way and I am thinking of somewhere in the region of 20-25mm before I have to swap the spacers to get the next 20-25mm. quickly mocked up the pin with freecad still need to go through the details in my head yet however.
30
Project Logs / Re: Steady for Harrison
« Last post by philf on March 16, 2024, 09:41:07 AM »
As for the pins this is my first thoughts.
The end of the highlighted shaft will be threaded to secure them in place which will be set by a number of spacers I can put either side dependent on the stock I am turning. The keyway will allow me to fully tighten it without it turning.
Inside will be a sprung brass bar with a screw to set it against the stock.

I assume that the spring is just there to stop the insert falling out?

How much adjustment will you have before needing to swap spacers?
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