Wave pocket clip on a Rebar (proof of concept)

AimlessWanderer · **Reply #30 on:** October 14, 2018, 01:22:50 AM

Quote from: Dutch_Tooler on October 13, 2018, 06:22:06 PM

However, I am not entirely happy - unfortunately there is quite some residual wobble around the pivot axis... see pics below for the extent

I fear that even making a small tab on the handle will not reduce this to zero as the tool lock is quite a bit narrower than the slot for it in the clip. I'll see whether I can live with this. After the Spirit challenge, of course

Wow! That's a lot of wobble!

Can you tell by feel, if the wobble is on the pivot bushing you made, or on the cut out for the lock bar?

Dutch_Tooler · **Reply #31 on:** October 14, 2018, 10:34:48 AM

Bit of both, actually. On reflection I think I might try to add the side tab mentioned earlier, but I'd prefer this to be of metal (more wear-proof surface) and will probably have to epoxy it to the handle. Not sure how that will hold though, as one could inadvertently apply a lot of torque via the long arm of the clip...

Alternatively, or in addition, I could instead of a collar ring, make something that matches the clip slot cutout exactly in planform. I could in theory use the flat sides of the pivot to keep this object rotationally fixed somehow, but the pivot-to-handle tolerances in rotation are not very tight so some wobble will remain even so... apart from the problem with fashioning a hole with flat sides, of course.

Dutch_Tooler · **Reply #32 on:** October 14, 2018, 10:52:18 AM

Quote from: Wspeed on October 13, 2018, 06:43:07 PM

Thanks for showing your progress D_T
Is the lock tab cut out on the clip to big

A little bit. I guess the lock is a little bit slimmer on the Rebar than on the Wave (?)

Dutch_Tooler · **Reply #33 on:** October 14, 2018, 10:54:36 AM

Quote from: chrono on October 14, 2018, 12:07:14 AM

What if you drill a hole on the Rebar handle, press fit/ Loctite a pin in, which also fit into the Wave clip slot?

Hmm... thanks - I'd prefer to not drill into the handles, if possible...

Wspeed · **Reply #34 on:** October 14, 2018, 12:38:21 PM

Quote from: Dutch_Tooler on October 14, 2018, 10:54:36 AM

Quote from: chrono on October 14, 2018, 12:07:14 AM
What if you drill a hole on the Rebar handle, press fit/ Loctite a pin in, which also fit into the Wave clip slot?

Hmm... thanks - I'd prefer to not drill into the handles, if possible...

No I am not keen on that as well
As it voids the warranty

I like it if the MT can be made to original spec again

Dutch_Tooler · **Reply #35 on:** October 14, 2018, 02:25:36 PM

The problem seems to lie with the indent in the longer of the clip's insert legs, which on the Wave has a matching stop in the handle, but not on the Rebar, see the rectangular cut-out left over near the clip insert leg's end in Pic 1.
I can almost make the wobble disappear by inserting an x-Acto chisel blade in that space, Pics 2 and 3. I simply need to find something metallic to fill that hole and which can be fixed in place, preferably removably.

Wspeed · **Reply #36 on:** October 14, 2018, 02:30:10 PM

I can’t think of anything at the moment

AimlessWanderer · **Reply #37 on:** October 14, 2018, 03:13:13 PM

Ahh! I think I see the issue.

Am I right in thinking a spacer piece along the inner wall, could brace that abutment lip against the rolled edge of the handle. Something like a piece of the magnetic strip off the back of fridge magnets? Are the handles magnetic?

The only other thing I can think of, is TIG welding that area on the clip, to build it up so it contacts directly with the underside of the rolled edge.

Dutch_Tooler · **Reply #38 on:** October 14, 2018, 03:35:09 PM

Yup. I'd been thinking along these lines too, AW - unfortunately the handles are stainless steel, i.e. non-magnetic. TIG welding would probably work, but I lack the equipment (or the skills, for that matter).

Current thinking is to make a filler that carries that stop tab (itself pretty awkwardly formed) and keeps it abutted against the rolled handle edge, and epoxied into the handle just inside of the rolled edge where the handle is widest and where it won't interfere with the clip. I'm a little bit worried that handle twist may make that a futile exercise, though.

Just building up the stop tab from JB-Weld appears to me to be too weak to start with, it would wear out quickly even if it stayed put, which it might not for long given adverse loads on inserting or turning the clip...

AimlessWanderer · **Reply #39 on:** October 14, 2018, 04:41:19 PM

With all this "add a bit here", and "add a bit there", would it not now (now you can see what needs to go where, and why) be easier to make a custom clip, using the Wave one as a template, but modifying the tang shape to suit the pivot and handle form? All that's needed is a bit of stainless, a vice, a hammer, and a dremel.

Dutch_Tooler · **Reply #40 on:** October 14, 2018, 04:58:32 PM

The origins of this project lie in the removability of the Wave clip and the almost identical positions of two of the three constraints (pivot and tool lock) between Wave and Rebar. The pivot only needed lengthening (Fuse) and the collar ring - check. The only thing that's still needed is the third constraint. That is proving to be a bit complicated

Fashioning a clip of my own would result in neither the versatility, nor nearly the neat finish, of the Wave clip. Can't take just any stainless, for instance, it needs to be springy enough. Then I shudder to think how it will look after I've deformed it

I have some spring steel somewhere, I could check and see how rust-resistant that is and how it reacts to being maimed

Wspeed · **Reply #41 on:** October 14, 2018, 05:30:18 PM

Or use normal stainless and heat treat it after
you have finished shaping and finished making the clip

That way it will be springy

AimlessWanderer · **Reply #42 on:** October 14, 2018, 06:30:42 PM

Quote from: Wspeed on October 14, 2018, 05:30:18 PM

Or use normal stainless and heat treat it after
you have finished shaping and finished making the clip

That way it will be springy

... and discoloured

Wspeed · **Reply #43 on:** October 14, 2018, 06:50:24 PM

Quote from: AimlessWanderer on October 14, 2018, 06:30:42 PM

Quote from: Wspeed on October 14, 2018, 05:30:18 PM
Or use normal stainless and heat treat it after
you have finished shaping and finished making the clip

That way it will be springy

... and discoloured

You will have to polish it up

Dutch_Tooler · **Reply #44 on:** October 14, 2018, 07:04:28 PM

I haven't given up on the Wave clip just yet... I'm thinking about fashioning (probably with some sharp files) a block of metal onto something with the profile shown below. Top right is where the clip's insertion leg comes on top, bottom left accepts the rounded-off handle edge, bottom further towards the right where the block would be epoxied to the handle...

Dutch_Tooler · **Reply #45 on:** October 22, 2018, 09:09:21 AM

Progress. JB Weld setting as I write this.

Poncho65 · **Reply #46 on:** October 22, 2018, 12:06:46 PM

Hoping this works

Wspeed · **Reply #47 on:** October 22, 2018, 12:23:02 PM

is it holding with JB weld
Any problems with this or
does it work okay so far D_T

Dutch_Tooler · **Reply #48 on:** October 22, 2018, 12:39:13 PM

I've decided to let it set for the full advised 24h, which means no results until tomorrow morning at the earliest

Wspeed · **Reply #49 on:** October 22, 2018, 12:40:08 PM

Makes sense

Dutch_Tooler · **Reply #50 on:** October 22, 2018, 10:03:03 PM

Couldn't wait and tried the clip on/off at 23h 30m after applying the JB Weld. Seems to hold well and I'm happy to report that the wobble is now reduced to max about 1.5 mm at the end of the clip - roughly as much as on my SS ReWaveR. It helps that the filler plate abuts against the handle edge so shear on the bond caused by attempts to rotate the clip about the pivot axis is minimal. The only major strain is in compression, and the bond should be able to manage that. So tentatively I'm happy, but time will tell.