Re: (ET) v belt for E12

["Rich Rock" <wealthy_stone hotmail com>]

Bob & fellow ET'ers,

The RMA (Rubber Manufacturers Association) has some universal nomenclature
standards for drive belts.  "3VX", which I believe is the appropriate type
of belt for the ET large frame drive, is a 3/8" (top width) by 5/16" thick
V-shaped notched belt.   Following are the representative trade names that
each of these 4 manufacturers use for a "3VX" belt:
1.  Browning:  358
2.  Goodyear:  HY-T Wedge
3.  Gates:   Super HC
4.  Dayco:  Power Wedge Vee Cog-Belt

The last 3 digits indicate the total outside diameter of the belt.  Zack
below says his old belt was a "3V335" which means it was 33.5" outer
diameter.  Because there was no "X" after the "V", his old belt had no 
teeth
or notches.  The Bill Gunn supplied Gates brand belt (3VX335) has the "X" 
so
has notches.  The first digit in the belt name, "3", specifies the width 
and
thickness of the belt: 3/8" (top width) x 5/16" (thickness).

The belt on my E12s is a "3VX355" which is 35.5" outer diameter.  There is
plenty of play in the motor mount to utilize either the 33.5" or the 35.5"
and I don't know why one might be better - the 33.5" OD belt is about $0.50
less so I'd go with that if ordering new.
http://www.grainger.com/Grainger/wwg/start.shtml is another source for 
these
and they will ship to your door or you can pick up at a distribution 
center.
Below is some information from the Grainger web page for a "3VX335"
including technical specs and ordering information.

      TECHNICAL SPECIFICATIONS
            Type 3VX
            Nominal Outside L (In.) 33 1/2
            Top Width (In.) 3/8
            RMA Belt Number 3VX335
            Thickness 5/16
            Edge Type Raw
            Standards Rubber Manufacturers Association



                  V Belt,33.5 In,3vx335
                  V Belt, Nominal Outside Length 33.5 Inches, Top Width 3/8
Inch, RMA Belt Number 3VX335, 5/16 Inch Thick

                        Grainger Item:   2L382
                        Price (ea) :  $13.37
                        Manufacturer:  DAYTON
                        Mfg. Model#:  2L382G
                 Ship Qty  :              1
                        Sell Qty (Will-Call) : 1
                        Usually Ships  : Today
                        Catalog 395 Page: 263


            Rich Rock
            E12s
            Rockwall, TX



----- Original Message -----
From: "Richard Zachary" <njcfsa earthlink net>
To: "robert winfield" <winfield100 yahoo com>; "Elec-trak list"
<elec-trak cosmos phy tufts edu>
Sent: Wednesday, September 29, 2004 7:57 AM
Subject: Re: (ET) v belt for E12


> Hi Bob,
> I got a replacement drive belt for my E12 from Bill Gunn last year.  He
> sent a Gates Super HC Vextra O&HR V80 3VX335.  The old belt that came
> off said 3V335 Browning.  The numbers were almost the same except for
> the added X in the Gates number.  The Gates belt has ridges or like
> little rubber teeth around the inside, I guess, to improve traction.
> Hope this helps.
> Richard "Zack" Zachary
>
> robert winfield wrote:
>
> >anyone have any ideas of what v belt replacement for
> >E12? motor to driving wheel. mine is slipping alot
> >
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