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Old 01-02-2004, 07:59 PM   #1
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Arrow alternative belt suppliers

hey all,

because rctech is THE place to go for all your rc info, , i thought i'd would start this brief thread for anyone who's had difficulty finding the right belt, or paying $15 from the kit mfr. like integy who sells the belts for their own atlas cars for $15 when all the others are $10. yeah, ok arthur.

because part of my enjoyment, is changing, and redesigning cars, i have had to find some belts that no rc cars even used. rare tooth number, etc. i thought i'd share what i've found...a while ago.

here are some great belt suppliers here in the states that will take personal orders of $25 or more. keep in mind that the belts are like 3-4 dollars ea. (not way marked up to 10 or 15 dollars). so you'll have to order a few. but it's great for those of you that want to play with thinning, soaking, or whatever else your mind can come up with to free up the transmission.

www.york-ind.com (good service, and cool/helpful engineer)

www.beltcorp.com (they'll cut to width for nothin')

www.fennerprecision.com (these guys have a great technical site to help calculate some stuff)

well, i'm sure there are many more, but these were the most helpful to me.

most touring cars use a 3mm pitch belt. there are a few different types, but most are interchangeable for our hobby. (though some wouldn't agree)
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Old 01-03-2004, 03:48 AM   #2
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Thanks for the info. Seaball
I want to take a look to see if they have unusual material....
perhaps like Losi uses...
what are the difference with a normal belt and a high grade one?
I mean comp. differences....
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Old 01-03-2004, 04:00 AM   #3
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they do have cool things!!!!

Neoprene Timing Belts
Fiberglass, Kevlar® or Steel Reinforcement
MXL, 40DP, XL, L, H
3mm, 5mm, 8mm, 14mm and 20mm HTD®
2mm, 3mm, 5mm, PowerGrip® GT®
8mm and 14mm PowerGrip® HTD®
Double-sided DH, DL, DXL
Twin Power PowerGrip® 8mm 14mm
Non-standard pitches

Molded Urethane Timing Belts
Polyester, Kevlar® or Steel Reinforcement
40DP, MXL, XL, L, H
Metric pitches T2.5, T5, T10
AT5, AT10
8mm and 14mm Poly Chain® GT®
Double-sided DT5, DT10
Dual Durometer covers
Cleats & lugs

Welded Urethane Timing Belts
Kevlar®, or steel tension members
XL, L, H, XH, T5, T10, T20
AT5, AT10, AT20
5mm, 8mm and 14mm HTD®
5mm, 8mm STD®
Supported Urethane Flat Belts: F-8, F-12
Unsupported Urethane Flat Belts: F-8U, F-12U
Open lengths can be welded together for long lengths or specials sizes otherwise unavailable
Conveying and linear drives
Nylon facing
Fused cleats & lugs
Extra backing available
Self Tracking
FDA/USDA compounds
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Old 01-03-2004, 04:02 AM   #4
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thanx again Seaball
which kind of material would you recommend for our application...
does the pitch differs from a RC manufacturer to another?
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Old 01-03-2004, 04:07 AM   #5
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Seaball : I must say : Thank you, you just provided me what I've been looking for for one month !!!
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Old 01-03-2004, 04:54 AM   #6
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Default belts for XXX-s!

do you have any info or recomended company that sell's after market belt for Losi XXX-S??
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Old 01-03-2004, 06:09 AM   #7
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Default Re: belts for XXX-s!

Quote:
Originally posted by babytoy101
do you have any info or recomended company that sell's after market belt for Losi XXX-S??
one of the company Seaball mentioned can make the belt you want, you just have to specify:
number of teeth
teeths size
width
material

since as seabal said you have a minimum of 25$ for one order you will get something like 5-6 belts you can share with your friend...pretty cheap
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Old 01-03-2004, 06:50 AM   #8
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great stuff dude.

So anyone knows the 'real' if it's not 3mm pitch for Xray belts???
u guys paying $10 bucks per belt?me too...
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Old 01-03-2004, 07:51 AM   #9
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Default Re: Re: belts for XXX-s!

Quote:
Originally posted by utieh
one of the company Seaball mentioned can make the belt you want, you just have to specify:
number of teeth
teeths size
width
material

since as seabal said you have a minimum of 25$ for one order you will get something like 5-6 belts you can share with your friend...pretty cheap
thanks utieh
do they have an online purhase order or a website were i can take a look on there services??
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Old 01-03-2004, 07:57 AM   #10
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Default Re: Re: Re: belts for XXX-s!

Quote:
Originally posted by babytoy101
thanks utieh
do they have an online purhase order or a website were i can take a look on there services??
your answeris the topic of this thread. look at the beginning there are 3 links posted by Seaball
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Old 01-03-2004, 09:23 AM   #11
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Default Re: Re: Re: Re: belts for XXX-s!

Quote:
Originally posted by utieh
your answeris the topic of this thread. look at the beginning there are 3 links posted by Seaball
how should i measure the pitch, number of teeth, width, pitch lenght and its lenght...... its quite confusing!

there is a code marking on the xxx-s belt (yellow) but i dont know how should i derive it into measurements!
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Old 01-03-2004, 09:36 AM   #12
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Default Re: Re: Re: Re: Re: belts for XXX-s!

Quote:
Originally posted by babytoy101
how should i measure the pitch, number of teeth, width, pitch lenght and its lenght...... its quite confusing!

there is a code marking on the xxx-s belt (yellow) but i dont know how should i derive it into measurements!
just send a mail to Losi....or someone will answer you soon here...
I am agree..I can't figure how to tell what's the teeth size.....on my HPI....if someone knows
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Old 01-03-2004, 09:51 AM   #13
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Default Re: Re: Re: Re: Re: Re: belts for XXX-s!

Quote:
Originally posted by utieh
just send a mail to Losi....or someone will answer you soon here...
I am agree..I can't figure how to tell what's the teeth size.....on my HPI....if someone knows
i hope someone will be an angel to drop by and tell us the belts measurement!!
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Old 01-03-2004, 04:33 PM   #14
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hey fellas,

there is really only one basic pitch length that our 1/10 scale cars use.

- 3mm (htd, pggt, or trapezoidal tooth profiles)

i'm still not sure if losi uses 3mm. originally i thought the pitch was .125 since they don't use anything metric! but i'm not sure. additionally, the losi yellow belts are urethane, and i have yet to see a urethane 3mm belt.

the pitch is the distance between crests, or vallies for that matter. there are different types of 3mm, but they will all work.
all of the black belts we use are 3mm pitch and are neoprene (well, at least the electric guys). fiberglass is the most common belting material, but kevlar and others are available if you are persistent.

- the htd is for high torque drive. the teeth are curvilinear.
- the pggt (or gates gt and gt2) is basically the same, but the teeth are just a bit shallower (.045 vs .048 of the htd). the point is, it's negligeable.
- the trapezoidal profile is what most current cars use. look at the pulley. are the grooves shaped like a trapezoid, or are they a truly semicircular with no seams or angles. when the belts are new, you can see the profile difference between the traps and the gt's.

heres the deal, as long as the pitch is the same, the teeth will match up with the grooves. the subtle differences in tooth profile will not make or break your drivetrain. the gt and htd profiles, when coupled with a pulley of the same profile will inhibit the skipping or racheting effect versus the trapezoidal profile, but most cars out use the trapezoidal style with no problems. i've used both, and a combination. ideally the gt or htd would be the best with the curved pullies (xpress, kx-1 that i know of), but it just doesn't matter that much, and most other cars have trapezoidal pullies (atlas, rclab, corally, xray, fsr, losi, duratrax...etc.)

barring any distinct markings, the only way to find what belt you are using is to count the teeth. here's an easy way.
- take a paint marker and a metric ruler. every ten teeth will be 30 mm, and so on. put a mark every tenth tooth, and count the sections, and add on the remaining teeth that don't quite make a full group. voila! you could even go in packs of 20, 30, etc if you were accurate with your measuring, but ten works out well for me.

that's it. now go get with your friends and order up!
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Old 01-03-2004, 04:49 PM   #15
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since i've done this before, here are a few things that i found noteworthy.

width.

you won't find less than 6mm stock. and that's pretty wide. the next up is 9mm, and those won't even fit. when i ordered i had them cut to 4mm. a better ideal is just to have them cut in half to get 3mm and 4.5 mm. perfect. and then you get twice as many. belt corp of america did the cutting for me for nothing. but i can't say that it's their policy. if all of you start ordering and a bunch of cutting they may get irritated. i dunno. try it, and let us know.

pliability.

even though these are the same as what the kits use, mine seemed to be a bit stiff. the backing is thick, and the durometer of the neoprene seemed a bit high. i suspect it is because these belts are typically used for power transmission and/or automation where nobody cares about efficiency, and the belts are tensioned for precise indexing.

now as far as the coding goes...it's usually the actual length that's listed on it. you just divide by the pitch and you'll have your teeth count. if you don't think that it's 3mm, just tip it upside down, and do some math. yes, math. pitch length is...a distance or length. since it is so small, use multiple teeth and divide by them, so as to get better resolution.

measure an arbitrary # of teeth and divide the length between the ends by number of spaces between them. ie, measure from a tooth to another one say 30 away from it. record the distance, and count the teeth including the ends. now divide the distance by ONE LESS than the number of teeth you just counted (that's the # of vallies).

then go look for something that is the same.

glad to hear that this helped or will help you out. of course, post what you know, and this could turn into great tuning thread for the belt cars.
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