Uses for Delrin

[Chuck in E. TN]

 I was given a large piece of delrin round stock, 2”x 24”. What can I make from it. I've seen spacers, bushings, and even a bench block made from it on the various forums. What tools or other interesting stuff have you made from delrin?
 Chuck

[PekkaNF]

You got a soft point hammer? Do you ever need to persuade bearings on their rightfull places gently, maybe assisted by a max. size soft bushing? Jacking pad (my favorite one is cut out of bar of something like 70 shore PU).

Don't just chop it, you will find uses for. My friends lug me all mystery "plastic" pieces they can find, mostly nylon of some sort, but occasionally even bakelite, russian extruded "teflon" or something exotic and they expect some small obscure parts. Don't blurt it out, unless you want to be popular.

Pekka

[Stilldrillin]

I use it for my trolley (shopping cart), tokens.

When I've run out of aluminium stock........




David D

[PTsideshow]

Ski's for the walkers, locally they want $13.00 a set, my mother will go thru a set of them in a month during the better weather months. If you do wood turning, you can make finishing bushings. Or if you are turning pens,bottler toppers or other other handle jobs. the instant glue doesn't stick well to it so it is easy to remove the item being turned from the centers or bushings. Flat, and round in other dia get be had from ENCO with their deals at a good price when you need to stock up. The white and the black have differing lube qualities, White or natural has high lubricity, Black is normal lubricity.
 

[David Jupp]

Great for light duty plain bearings that don't need any lubrication - you see it used widely inside computer printers.

[Swarfing]

I use it a lot on leadscrew nuts for my small machines i make.

[Brass_Machine]

I use it a lot on leadscrew nuts for my small machines i make.

Oh? I have been thinking about doing that... Care to give us a walk through?

Eric

[andyf]

This looks interesting, Eric, though I've never tried it myself: http://bbs.homeshopmachinist.net/threads/43645-Making-Acetal-leadscrew-nuts-the-easy-way

Sorry to interrupt!

Andy

[Chuck in E. TN]

David D, What;s a trolly token?
I tried cutting a slice off the Delrin bar for a project with my 4x6 bandsaw. I forgot it had a 22tpi blade on it. It cut a bit, then the blade just skated. The teeth filled up with swarf and it seemed to melt to the blade. I spent several minutes cleaning the blade off, LOL.
I have a 10-14 tpi blade but I'm not sure that will do much better.
Chuck

[Swarfing]

Eric

Andy hit a good site of a reasonable process, failing that I've just made a tap from spare rod if it is a square thread.

[Brass_Machine]

Yup. Read through that process quite a bit. In fact, that was the thread that prompted me to try it. I have bought the delrin, just haven't gotten around to it yet.

[Swarfing]

I find i do have better success with using Acetol. It is a pain to using a tap on it as it takes a lot of back and forth to cut.

[andyf]

I thought Delrin was a trade name for a variety of acetal: http://en.wikipedia.org/wiki/Polyoxymethylene
though that's only Wikipedia and the phrase "slightly different formulas" may be more significant than it appears at first glance.

Andy

[Swarfing]

You are correct but i have both Acetal and Delrin. I found that the Acetal has more slide quality and looking at the specs on line found you can get all sorts of grades. The Acetal i have originally came from a company that makes replacement hip joints.

[Stilldrillin]

David D, What;s a trolly token?
Chuck

Chuck.
Over here, the supermarket shopping trolleys need a £1 coin inserted, to release from their storage area. The coin is released on the trolley's return, after use.

Many people have a coin size, (and weight), replica, attached to their key ring.

I make around 20 per year of my lightweight version, and give them away.......

David D

[Chuck in E. TN]

Ah, yes. Like the luggage trollys in the airports. So you get a trolly without paying the £, and get a £ back when you return it? And the shop lad gets the dole?
Chuck

[DMIOM]

Ah, yes. Like the luggage trollys in the airports. So you get a trolly without paying the £, and get a £ back when you return it? And the shop lad gets the dole?
Chuck

No Chuck.

You put your coin into your trolley to release it, and when you dock your trolley after shopping you get your own coin (or token) back.

The reason folk like a token on the key ring is that it's frustrating to go shopping and realise you can't get a trolley because you emptied all the coins out of your pockets last night ....

[andyf]

I parked at Aldi when shopping in the town centre today, and on returning to the car found one of their trollies abandoned nearby with a pound coin still in it. So I returned it to the trolley park and plugged it in to extract the coin 

Chuck, many folk over here arrive on the bus or have parked elsewhere, so the local bus stops,  car parks etc get cluttered with orphaned trolleys if you don't have to pay a refundable deposit to use them.

Andy

[Chuck in E. TN]

I see, said the blind man! Thanks for the explanation... Good idea, actually. Here in the US, we'd probably get mugged for the cart!
Chuck

[andyf]

On the handle of each trolley or cart is a slide to entrap the coin, and dangling below that is a chain carrying a key affair of fairly simple profile. When you collect your trolley, it will be locked to the rank by having the key of the one behind plugged into it. Inserting your coin releases that key, so you can pull your trolley away. When you are done, you return it to the rank and plug in the key of the one behind it, which releases your coin. The chain is too short to allow the key hanging from your trolley to release your coin.

It did once occur to me that if one were to reproduce the key (or snip the chain holding an  original one), he could wander round the store with it, pocketing the coins from those trolleys whose users were distractedly wondering which tin of baked beans to buy. A false beard would be needed, because of the CCTV.

Andy

[dsquire]

On the handle of each trolley or cart is a slide to entrap the coin, and dangling below that is a chain carrying a key affair of fairly simple profile. When you collect your trolley, it will be locked to the rank by having the key of the one behind plugged into it. Inserting your coin releases that key, so you can pull your trolley away. When you are done, you return it to the rank and plug in the key of the one behind it, which releases your coin. The chain is too short to allow the key hanging from your trolley to release your coin.

It did once occur to me that if one were to reproduce the key (or snip the chain holding an  original one), he could wander round the store with it, pocketing the coins from those trolleys whose users were distractedly wondering which tin of baked beans to buy. A false beard would be needed, because of the CCTV.

Andy

Andy

Just for the thought alone you are hereby ordered to eat baked beans for the next 30 days as punishment. You may wear a false beard if you feel you need a disquise. Also, no shopping at stores that use token trolleys. 

Happy New Year

Cheers 

Don

[andyf]

Hmm. "Blazing Saddles" comes to mind, Don.

Andy

[DavidA]

Andy,

A while back I was sat in my car in Morrison's car park awaiting the return of my wife.  A guy came swaggering  by (the only way you could describe it) and aimed his trolley at the trolley park and walked off.

'Ah yes',  I thought, 'a free pound here'. So I watched him until I was sure he wouldn't return for the coin,  then parked the trolley and then got the pound.
So what ? one may ask.

Well, the same guy got into one of these big 4*4 things,  which fit his swagger perfectly. Then fired it up, locking  the steering hard over the right he set of backward and promptly ripped off his front bumper on one of those short post that morrisons have.

Ah, yes.  could be expensive.  I considered giving him the Pound back to help with the cost but decided it was better (and probably safer as he looked annoyed) to just drive off.

Dave.

[raynerd]

Dave, what a rotten idea - but one that I also have shared!!

I know I'm just taking this even more off topic but my wife has been pestering me to make some trolley tokens for her keying for over a year. I take it that it is just the £1 dimensions that are critical.

Chris

[Stilldrillin]

Chris.

The o/d works best at, .888".

Thickness, .120".

You don't need the bit in the middle. Mine are around .6" bore. 

David D

[Fergus OMore]

How sad. How utterly sick fetching! All this for a quid coin?

I almost wrote- Get a Life ( and I have)
If I get banned, bollocked, or whatever-- it will all have been in a good cause.

[raynerd]

....very confused! Are people getting the wrong end of the stick here????

In England, most supermarkets use a £1 coin, specifically, to release a trolley. This encourages customers to return their trolley after use! This little disk can be clipped to a key ring so that you don't have to worry about having a coin with you. You shove in the disk and it pops back out at you when the trolley is returned. If you leave it in you loose the disk and someone else will pop it out so it doesn't ever benefit anyone!!! It seems like people think you are somehow using this disks instead of spending £1 and ripping someone off!

[DavidA]

Fergus,

I (and some others it seems ) fail to see what you are getting wound up about.  No one is cheating anyone out of anything.

What is your problem here ?

Dave.

[Fergus OMore]

Actually people are being 'ripped off' from the use of tokens.

My wife reported that she- amongst others, had been robbed.
a £1 means nothing to us but some old age pensioner livin- or trying to live on what is a pittance, it is a sorry state.
If you are happy with creating a situation where more tokens are being produced, I'm not.

regards

Norman Atkinson

[raynerd]

Norman, thanks for your reply but I am still incredibly incredibly confused.

Are we talking about the same type of tokens since I can't see in the slightest how you can be ripped off by them. The police produce trolley tokens !!!!!! You put the trolley token in, you take your trolley, you return the trolley and you pull out the token.

[Stilldrillin]

Norman.
Please pm me your address.

I will gladly post you 2 of the alloy tokens, from the batch in my picture.

David D

[DavidA]

Norman,

You still seem to be getting the wrong end of this.

As Raynerd says, you are only using the £1 coin or a token (home made or otherwise) to unlock the troley from the trolley park.
When you are finished you get your own coin or token back. This ensures that you put the trolley in the proper place and don't just leave it where your car was.
No one else would have got your £1.  It isn't a 'fee' to use the trolley. Nor is it equivelant to minting one Pound coins with the intention of using them to obtain goods or services.

I apologise if I have opened some old wound with this,  but I really do think you need to understand what is going on here.

Dave.

...a £1 means nothing to us but some old age pensioner livin- or trying to live on what is a pittance, ...

I should add that I too am a pensioner(68 years old) living on 80% of the state pension. Plus my wifes part time minimum wage income.

[Rob.Wilson]

As usual Norman you have no idea about what your talking about . 

The token /£1 coin stops with the trolley you are pushing your grocery's around in , so how can anyone be ripped off ,


My wifes token


fook me it even has a trolley on the reverse side .



Rob

[Fergus OMore]

Rob,

 Morrisons in Killingworth- for starters. Not talking about ethereal place which no one has heard about. I don't intend to prattle on much further but ask yourself how do trolleys mysteriously appear in places far away from their shop? Nobody but an idiot is going to expect that someone is going to put a quid coin it- and dump it- perhaps in a boating lake( Killingworth)- I hit one That's another story!.

-------------------------------------------------------------------------------------------------------

As for the offer of a couple of tokens, might I politely decline an offer of charity- or whatever

[DavidA]

..Nobody but an idiot is going to expect that someone is going to put a quid coin it- and dump it-

You can release your coin or token with a wooden lolley stick or anything similar;  it's not rocket science.

My last words on the subject.

Dave

[Chuck in E. TN]

You guys, can we put the trolly tokens to bed, please? I haven't laughed so hard in yonks! It's amazing what people can get all wadded up about.
Any other creative uses for 2" round delrin out there? I need a better reason to change the blade on my band saw to cut the bugger up! How about hockey pucks for midgets?
Chuck

[Stilldrillin]

Sorry Chuck!

It did get a bit out of shape, didn't it!     



Mod's hat on.

Lets all get back to delrin and it's uses..........

David D

[andyf]

Mod's hat on.

Lets all get back to delrin and it's uses..........

David D

Yes, that's probably wise.

The changewheels on small Chinese lathes are usually Delrin or a similar acetal, and metric Mod 1, so your 2" bar could be turned into extra gears of 49T or less, Chuck. I suppose it may be easier to cut teeth in acetal blanks than in metal ones.

Andy 

[Rob.Wilson]

Andy Just pipped me to the post  was going to say gears .

http://www.huco.com/products.asp?p=true&cat=264


Rob

[Rob.Wilson]

Wile on the subject of Plastics  I have attached a plastic  ID chart , It may help you out if you have some mystery plastic.


Rob

[Bluechip]

Chuck
You can use it for distributor caps etc. It's not a bad HV dielectric. Not the best but pretty good at resisting tracking.

Lets all get back to delrin and it's uses..........

David D

Shame about that. I was going to mention that Londoners refer to a counterfeit token as a 'Flakey Tokey'.
In fact IIRC they had a song; .... Put your Flakey Tokey in, Take your Flakey Tokey out. In, Out, In Out, Wave it all about ... etc etc ..
But I won't as it's forbidden ....
Byeeeeee 
 
BC
 
 
 
 

[Chuck in E. TN]

There we go, good ideas all.  Rob, I've seen that chart before but lost it in a drive crash. Saved it to my info pile, thanks.
Chuck

[DavidA]

Off topic.  But how do you get the little national flags to appear under your name ?
Dave.

[PTsideshow]

Just to add for you guys back on the eastside of the pond Around here Aldi's is the only one locally that has the coin unlocker. It is our .25¢ piece or a quarter of a dollar. And it amazes me how many people don't bother with getting the quarter back. I generally take in a cloth bag as I don't buy much there. Also I take my folding luggage type trolley in when I buy the 4 or 5 cases of water. Only have to handle the cases twice instead of 4 times.

Man a pound that's $1.61 at the current exchange rate.

[ieezitin]

What about tool makers buttons?......... it slides nice and is able to hold a nice finish.

Anthony.