Pins and no needles

hi,

Mid week mental work out time I'm afraid.

I'm looking for a way to remove the tiny pins you get at the end of copeing saws. I can bash them as far as being flush on one side but I'm struggling to get them the last through..

Any suggestions I did think perhaps a small pin punch, 1mm or less. But the size makes it difficult to line things up. I wondered was there a special tool a bit plié pliers or something?

Thanks for the great ideas on cutting tube I've got my self a jewellers tube/rod holder designed for the job works a treat. As was suggested by one of you super heroes.

Hi Izack,

How about a centre punch and a loupe? Whatever you use it'll need to be lined up, yes?

Ed.

Not Coping saws but with junior hacksaw blades I have done just as you have done then grab the end of the pin with a pair of pliers and twist & turn the pin until it comes out of the blade. This may be a bit more difficult, given how narrow a coping saw blade is.

Izack,

If the pins are sacrificial, I would grip the pin with a pair of end-cutters [instead of pliers], and then twist as Bob suggests. [the oblique ones, like 7291, are very useful]

If intending to re-use the pin, then either make a little jig to punch them out, or try gripping in a pin-chuck [pin-vice] for the twist & pull.

MichaelG.

Edited By Michael Gilligan on 18/06/2015 05:58:41

Just wondering, Izack ...

Why do you want to remove the pins from coping saw blades?

MichaelG.

Hi Izack

I would knock the pin flush in the almost closed jaws of my vice making sure I did not peen the end of the pin too much, maybe a brass drift would help, then put a piece of metal with a hole in it (an old normal hack saw blade would do nicely) under the junior blade, then put them back in the vice and tighten the jaws on the downward projecting pin.

Then inserting two levers (Screwdrivers) under the full size hack saw blade against the vice lever the blade up exerting pressure evenly from each side. By using two levers the blade is lifted straight up, there is less chance of it digging into the pin.

Regards
John.

Get a fine pin punch, open your vice just a tad, lay the blade over the gap and tap the pin out. Presto.

If you look at the pin you may find it's burred when it was cut off so you may need to dress before doing the above.

Edited By Jesse Hancock 1 on 18/06/2015 20:05:21

Edited By Jesse Hancock 1 on 18/06/2015 20:07:32

That's right I've done it I'm really hopeful there is an simpler way as it's sort of the thing I can image engineers might do such as cotter pins. But then again it's also the sort of thing that engineers would make themselves

Because I've got a jewellers saw which the blades have no pins. In case the blade jams then it pulls out of the saw not bending Mrs blogs new ring. And I've also got about 60 copeing saw blades but these have pins. Basically I'm tight and don't like waste.

I think the burr is what's sticking but being wood blades they are not too hard just fiddly. As they are only 2.5mm x 0.75mm. I'm able to pull them out but it really needs there hands...

I've got a block of oak and used the end grain as the pins are small enough to dig into whilst the oak is strong enough to take the blows. And I've got a thin bladed blunt knife which I can slide under as its got no bevel. The only problem then is holding the pin, holding the blade and holding the knife. And no matter which way I count them I've only got two hands. I tried using my feet but I'm to old now a days for daft tricks like that.

Thanks for all the great responses. And any more that come through. It was just a thought as ther are also rats of weird and wonderful tools designed for such as the car industry that work great for woodwork but don't get noticed as most wooden tops wouldn't even look amongst "those" sort of tools in case they get oily just by looking at them

Basically I'm tight and don't like waste.

.

Good answer !! ...

MichaelG.

I'm really hopeful there is an simpler way as it's sort of the thing I can image engineers might do such as cotter pins. But then again it's also the sort of thing that engineers would make themselves

.

A miniature version of a chain link extractor is probably what you need.

MichaelG.

Edited By Michael Gilligan on 18/06/2015 22:13:38

Posted by Michael Gilligan on 18/06/2015 22:10:47:

Posted by Izack Madd on 18/06/2015 21:19:34:

I'm really hopeful there is an simpler way as it's sort of the thing I can image engineers might do such as cotter pins. But then again it's also the sort of thing that engineers would make themselves

.

A miniature version of a chain link extractor is probably what you need.

MichaelG.

Edited By Michael Gilligan on 18/06/2015 22:13:38

This was sort of thinking i was hopeful of. BUT... Do they make one that small?

Posted by Michael Gilligan on 18/06/2015 22:10:47:

Posted by Izack Madd on 18/06/2015 21:19:34:

I'm really hopeful there is an simpler way as it's sort of the thing I can image engineers might do such as cotter pins. But then again it's also the sort of thing that engineers would make themselves

.

A miniature version of a chain link extractor is probably what you need.

MichaelG.

Edited By Michael Gilligan on 18/06/2015 22:13:38

Having looked at this device.

If I take a block of...? Drill a hole the right size for the pin, cut a notch out that transepts the hole midway. Widen the top half of the hole. And epoxy a nut in the notch and get a wing bolt. File the tip down to just fit through the hole so as its less likely to snap or wander. The pin will locate in the small drilled hole. The filed wing bolt will locate, I hope, automatically and pop the pin out and if I put a second notch after the first the pins should push each other through.

Great plan Batman. Or should I say Michael...

This what I love about you lot while the answer may not be out there as we are from differing field ideas spring forth. Thanks to all.

You might find it helps to grind the pin down flush with the blade before pushing it out with the above device.

This is standard technique for using chain breaker tools on modern heavy duty motorcycle chains. It might do away with the burr on your pins and make the pin easier to pop out that last little bit.

.

Well done, Izack ... You have just demonstrated the "Engineering" process

The Craft of making it is one thing; but ingenuity is the Engineering.

... So much more satisfying than either "Painting by Numbers" or just Shopping.

MichaelG.

Hello Izack

Last year I purchased a tool used by jewelers to adjust expanding watch straps. It works just like a chain link extractor, and has a small drive pin which should extract those in coping saw blades.

It cost me less than £5 on ebay and although you might need to modify it slightly to cope with the difference in dimensions between a watch strap and the saw blade, it should easily cope with the task at hand. I cannot find it at present in order to photograph it, but a quick google for 'watch strap pin remover' produced plenty of results from £0.99 upwards.

I hope this helps you.

Best regards

Derek

Izaak,

As you are using a jewelers saw and seeing that they seem to take blades of almost any length why not try breakikng off the two offending ends of your coping blades so that they can be inserted into the clamps of the saw.
BTW I was amazed at how small real jewelers saw blades can be,.006 x .012 and passing through a No 80 hole. Coping saws are positively HUGE in comparison.

Bob D