Working with derlin | GTAMotorcycle.com

Working with derlin

moarmoto

moarmoto

Well-known member
I have a pair of frame sliders made of derlin that is slightly too big of a diameter, maybe 2mm.

Returning them costs the same as the product itself and inquiring about a turn down service at a local machine shop costs $75. I bought them for around $25.

So I ask the knowledgeable folks here:

1) I was wondering if I could maybe 'file' it down by attaching the slider puck to a drill and using one of those hand files fixed on a vise.

Does anyone have an insight or experience if that'll work?

2) If not, any recommendations on a shop with cheaper rate? I know jack about machining but it can't be more than like 10min job. I'm in Burlington area.

Thanks

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Considering they will wear down when rubbed against the road....if you can run it in a drill against a file, should wear them down 2mm without issue. Go slow and might even be able to finish with finer grit sandpaper.
 
Delrin can be turned on wood or metal lathes. Find a small machine shop, bring $20 cash and the exact diameter.
 
Sharp wood working tools will cut it clean, metal lathe is perfect, files not so good, you want to cut away material cleanly a file might even make it melt first.

... I've worked a lot with Thordon which is a Canadian made competitive product to Delrin
 
Find a friend with access to a lathe.
 
Unfortunately, I know no one with a lathe.

I did inquire a few other smaller places and lowest I got was $50 minimum since it'll make them stop whatever service that they're currently working on. Bit high for what I expect but I do understand that so maybe that's what'll cost.

Though, I read over Derlin information sheet and it does say it can be filed and grind down effectively with vixen mill.


Quote:
Filing and grinding
A mill file with deep, single, cut, coarse curved teeth,
commonly known as a “Vixen” file, is very effective on
DELRIN. This type of file has very sharp teeth and pro-duces a shaving action that will remove DELRIN smoothly and cleanly. Power-driven rotary steel burrs or abrasive discs operating at high speeds are effective in finishing parts of DELRIN. Standard surface grinders and centre less grinding machines can also be used to produce smooth surfaces of DELRIN.


I don't know what file I have, but I have a cordless drill and a vise. I'll give it a go. Wish me luck.

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You may have better luck with a rasp than a file. Most files will be cut far too fine. Let us know how it goes. Option C or D could be emery cloth. That lets you apply friction over a much larger area.
 
If you want them round, you NEED a lathe... or a mill and a rotary table.
Filing or sanding will take a month of sundays, and unless you have something, like a chuck, to hold it on center it will not come out round. You don't have enough strength in your hands to hold it.
If you build a jig to hold it in a drill press, you'll take out the bearings in the quill of the drill press. Those bearings WILL NOT take any axial load.

I'll turn them down for you... but I'm in Lindsay.
 
bitzz said:
... Those bearings WILL NOT take any axial load.
Click to expand...
Are you sure your're talking about Delrin? They are outstanding for axial loading, that's what they are so commonly used for washers, caster bushings and tophats. I used them for cutless bearings in a pinch -- they outlasted the standard OE bronze bushings.
 
$25 ??

toss them (or give them away free here)
and buy some that fit

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Showrooming

Maybe this is part of the reason we don't have as many local bike shops left in the GTA ? Just asking, you know, for a friend.... Why 'showrooming' is hurting smaller Canadian retailers
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IF your files isn't sharp it will just melt after you bung up the file …. You might get away with using very coarse sand paper …. For 25 bucks you might find out they are UHMW plastics that is even softer and requires even sharper tools to work with.
 
bitzz said:
... wait... WHAT??
You replace bronze bushes with delrin?
Click to expand...
Absolutely. Delrin is extremely tough, chemical and corrosion resistant and lubricates with water. Delrin is used extensively for bushings/bearings, seal and thrush washers in the industrial caster industry. As a rudder cutless it's cheap as dirt and will last decades under water.
 
I would NOT say delrin is tough, its wear resistant but.........

.....Delrin is also brittle, Ive got a LOAD of experience machining it. It cuts nice, but will chip off in certain circumstances. I could never understand WHY anyone would want to use delrin as a slider, Im gonna tell you, the second that slider hits the pavement when/if your moving, it will just snap.

If you want tough material for sliders, you need some kind of nylon material. the axial loads people expect from a "slider" made of delrin are unrealistic.

Personally, the only thing sliders are good for are parked or ultra slow dumps, if your moving in the slightest bit, sh*ts getting damaged no matter what, and I think the reason people might consider delrin is for the reason it will break off if your moving, because when that slider catches the dirt, the bike will flip. Hence why I took my sliders off my last track bike.



That being said, I work monday - friday at keele and langstaff, if you want me to turn those down for you, show up with a large mcdonalds coffee ;)
 
Last edited:
Rob Star said:
I would NOT say delrin is tough, its wear resistant but.........

.....Delrin is also brittle, Ive got a LOAD of experience machining it. It cuts nice, but will chip off in certain circumstances. I could never understand WHY anyone would want to use delrin as a slider, Im gonna tell you, the second that slider hits the pavement when/if your moving, it will just snap.

If you want tough material for sliders, you need some kind of nylon material. the axial loads people expect from a "slider" made of delrin are unrealistic.

Personally, the only thing sliders are good for are parked or ultra slow dumps, if your moving in the slightest bit, sh*ts getting damaged no matter what, and I think the reason people might consider delrin is for the reason it will break off if your moving, because when that slider catches the dirt, the bike will flip. Hence why I took my sliders off my last track bike.



That being said, I work monday - friday at keele and langstaff, if you want me to turn those down for you, show up with a large mcdonalds coffee ;)
Click to expand...
Thanks for the offer. Schedule would be an issue.

Personally I've only had low speed (verrrry slow) and stationary drops and in those cases frame sliders, also derlin I believed, did save fairings from damage. No experience in high speed crash but I have seen videos where sliders supposedly flipped a bike.

Right now Ive had this naked bike for 3 years and didn't bother with sliders up until now. I booked sharp rider course and wanted to put them on just in case.

I'm gonna still try file + drill method. It was only 25 bucks and wouldn't be too bad if I F it up.

By the way, the seller advertised the sliders as fitting 2017+ year sv650 (same as gladius frame) but they only properly fit 1g and 2g sv650s. Apparently someone at svriders forum was able to fit them with turning the down with lathe.



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If youre in Burlington, maybe try this, there's a shop called robust gear and industries in oakville near the QEW and third line. Nice guys, an owner named Anjin and a manager named Zack. Go there on a saturday (laid back day, not business as usual, they aren't a custom shop, but they have the machinery to help you and they are small enough you can walk in the front door and mee the owner or manager) , they are always there, drop in and ask if anyone can help you out, that's the best I can suggest in your vicinity.

I can't condone the butchery of your "file and drill" method lol
 
If you’re in Burlington like Rob posted above (I’m on mobile can’t see locations) and want to get those to him in Vaughan I can help you out.

I take 407 through Burlington daily and use the MTO office on Keele 2-3 times a week so it would be easy for me to do.
 
Rob Star said:
If youre in Burlington, maybe try this, there's a shop called robust gear and industries in oakville near the QEW and third line. Nice guys, an owner named Anjin and a manager named Zack. Go there on a saturday (laid back day, not business as usual, they aren't a custom shop, but they have the machinery to help you and they are small enough you can walk in the front door and mee the owner or manager) , they are always there, drop in and ask if anyone can help you out, that's the best I can suggest in your vicinity.

I can't condone the butchery of your "file and drill" method lol
Click to expand...
Lol I'll take your advice on avoiding butchery.

Thanks for the info, I'll drop by that location.

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If you're up for a drive to Courtice, I've got a small lathe in my back shop and could do them for you on a weekend.

You won't get a pretty surface finish, but I would use a drill and sand paper before I paid a shop to use a lathe for 5 minutes.
 
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