christmas presents...FOR ME!

[drl]

Definitely a confusion factor involved here. And reading the replies I do now recall that the hex head drive inserts did have cuts along the outside thread portion so that kind of puts the "screw driver" type slots in the aiding the threading process column. But then the question comes up as to why the power driver was then created?? Looking forward to what you guys come up with. Meantime I need to make some sawdust.
Regards,
Dwight

[JPG]

While we are still off subject.....

Since I have specified these for use in my old job there is NO doubt in my mind how the manufacture designed these to be used.

So how about if I reference the grainger catalog?

http://www.grainger.com/content/catalogPdf?adobeCompatible=true&CatPage=3288

Another place

http://www.zorotools.com/g/00096144/k-G ... MgodlmoASQ

Mmmmm seems like who is telling us what?

I stick by what I have posted.

Ed

Observations 2:

The inserts linked to(at the top of the page) are for use in tapped holes in metal. They closely resemble the ones in 'the video'.

At the bottom of the page are inserts for use in hardwood. They differ in that the slotted end is devoid of the threads. It also refers to knife edges, so I assume that means they are intended to be used for self cutting of the threads in the hardwood.

I believe the insert tools are intended for either type insert on the page.

So back to the 'slotted ends are for cutting threads in wood controversy'.

I think they vary with the manufacturer. The Grainger wood version does not appear to use the slot as a tapping tool.

Zoro version intended for use in metal also.


I think whatever works for one is the way they should go.


DUSTY:? Are the ones you pixed have those projections in a spiral, or are they concentric? If concentric, driving them in makes sense.



I am beginning to wonder if tis a different strokes fer different folks thingey!

[reible]

OK, lets go another route. These inserts were not developed for home work shops, they were developed for manufacturing. When a company might be ordering 100,000 or more of them at a time. They came with tooling and the slots were for made to insert the insert. We used these way before you and I could to a hardware store and by them.

Now for those that like the threaded cutting idea, here is what I did, I went and got a 1/4" brass insert out and looked at the chart to see what drill size is specified.

softwood is 3/8", hardwood 13/32"

lets go to decimal

3/8" = .375"
13/32" = .406"

now I measure the max outside dimension where the slot is cut (not over the slot) .........

Mmmmmm .360"

Now I find it hard to understand how a .360" part is going to "thread" a hole that is already .375" much less a hole of .406".

Now you could find some specially designed part that would do threading on its own using the slot but the ones you buy from places like Rockler are not them. BTW Rockler also says what I'm telling you about how to install them.

[dusty]

Observations 2:

The inserts linked to(at the top of the page) are for use in tapped holes in metal. They closely resemble the ones in 'the video'.

At the bottom of the page are inserts for use in hardwood. They differ in that the slotted end is devoid of the threads. It also refers to knife edges, so I assume that means they are intended to be used for self cutting of the threads in the hardwood.

I believe the insert tools are intended for either type insert on the page.

So back to the 'slotted ends are for cutting threads in wood controversy'. ]DUSTY:? Are the ones you pixed have those projections in a spiral, or are they concentric? If concentric, driving them in makes sense.[/B]



I am beginning to wonder if tis a different strokes fer different folks thingey!

The little spurs are in a vertical line; i.e. they do not spiral like thread.

[JPG]

I think we have proven there are different designs and different intended methods for insertion.

IIRC the video used inserts that resembled the stanley wood inserts.

[ATTACH]23515[/ATTACH]
It has a deeper 'slot' and threads extending all the way to the end.

The ez-lok inserts(that use the insertion tool) are undercut at the slots as Ed described. I noticed both the metal ones and the wood ones are undercut(smaller od at the slot area).
[ATTACH]23516[/ATTACH]

Also Dusty's inserts are driven in since the protruding 'fins' are not in a helix orientation.

DRL's hex socket insert 'fins' I assume are oriented to a helix to allow screwing them in.

[drl]

I watched the Tommy Mac woodworking show on PBS today and he had three guestsand himself making kitchen utensils. Low and behold he turned a pizza cutter handle. Though not shown he says he installs the insert with a screw and lock nut. A quick closeup on the insert showed the "flat head screw style" slots fully inserted into the handle with the slots facing out. I'm not saying he is right or wrong just an observation. Of course he did have a guest turn a french rolling pin and observed him hitting the MT2 drive spur into the blank with a steel hammer! FYI
Regards,
Dwight