Belt length change - Page 2 - Snowblower Forum : Snow Blower Forums
Reply
 
LinkBack Thread Tools
post #11 of 35 Old 04-11-2018, 03:30 PM Thread Starter
Senior Member
 
Join Date: Jan 2015
Location: Ottawa, Ontario, Canada
Posts: 713
Post Thanks / Like
Thanks (Given): 48
Thanks (Received): 100
Likes (Given): 56
Likes (Received): 99
Measuring the new belt with a string many times gives a consistent 42" using a retractable tape measure and a fibreglass flexible (seamstress type) tape measure to apply the string length. Measuring the belt with a fibreglass flexible tape measure directly gives 41.5" consistently.

To measure the belt I formed the belt into a somewhat rounded shape (and used a wrench to maintain that shape) to provide consistent pressure for the string/tape to press against the outer surface of the belt. Wrapped the string around the belt and marked the string at the length with very light pressure and transferred the length to a tape measure at 42" long. For the flexible tape I wrapped the flexible tape around the belt and at the overlap point it measured 41.5". Since the flexible tape is very thin there would be less of a loss to the thickness of the string exaggerating the belt length, so perhaps the flexible tape is more accurate? Perhaps the belts are 41.5" long.

Is there a better way to measure the length of a belt since I am still off from the length researched by 1132le at 41.125" circumference? I was not able to find a belt length for the Ariens 07200703 pair of auger belts directly.

2015 Ariens Platinum 30 SHO - model 921040
Town is online now  
Sponsored Links
Advertisement
 
post #12 of 35 Old 04-11-2018, 04:18 PM
Senior Member
 
1132le's Avatar
 
Join Date: Feb 2017
Location: ma
Posts: 1,124
Post Thanks / Like
Thanks (Given): 26
Thanks (Received): 81
Likes (Given): 59
Likes (Received): 178
Garage
Quote:
Originally Posted by Town View Post
Measuring the new belt with a string many times gives a consistent 42" using a retractable tape measure and a fibreglass flexible (seamstress type) tape measure to apply the string length. Measuring the belt with a fibreglass flexible tape measure directly gives 41.5" consistently.

To measure the belt I formed the belt into a somewhat rounded shape (and used a wrench to maintain that shape) to provide consistent pressure for the string/tape to press against the outer surface of the belt. Wrapped the string around the belt and marked the string at the length with very light pressure and transferred the length to a tape measure at 42" long. For the flexible tape I wrapped the flexible tape around the belt and at the overlap point it measured 41.5". Since the flexible tape is very thin there would be less of a loss to the thickness of the string exaggerating the belt length, so perhaps the flexible tape is more accurate? Perhaps the belts are 41.5" long.

Is there a better way to measure the length of a belt since I am still off from the length researched by 1132le at 41.125" circumference? I was not able to find a belt length for the Ariens 07200703 pair of auger belts directly.
thats a used belt right? might have stretched to the 41.5
I cant find the length of my belt using the part number anywhere on the net
As my top pulley is a 1/4 inch less then yours should be about 1/2 inch shorter buti cant find the od any place
1132le is online now  
post #13 of 35 Old 04-12-2018, 08:16 AM Thread Starter
Senior Member
 
Join Date: Jan 2015
Location: Ottawa, Ontario, Canada
Posts: 713
Post Thanks / Like
Thanks (Given): 48
Thanks (Received): 100
Likes (Given): 56
Likes (Received): 99
Quote:
Originally Posted by 1132le View Post
thats a used belt right? might have stretched to the 41.5
I cant find the length of my belt using the part number anywhere on the net
As my top pulley is a 1/4 inch less then yours should be about 1/2 inch shorter buti cant find the od any place
No, I am trying to measure a new belt. I have a new pair from my dealer as spare. I don't want to tear into my machine yet since it needs to be operational for a while yet; a foot of snow is forecast for the weekend.

Ariens parts list has the size of the Auger belt on the 926501 (source for my 14/6 ordered impeller) as 38". Cannot find anything from Ariens in the 42" size range I might need for the 3.25" pulley. Checking further afield there does not seem to be many belts in the 42" range and even less sold in pairs. The pair I found are 42.5" and cost CAD$80 plus shipping so not an attractive proposition for 2 sets.

From what I have seen in my setup the old belts on my machine will easily accommodate a 3" pulley with enough belt slack when the adjustment is backed off. Don't know about a 3.25" pulley.

2015 Ariens Platinum 30 SHO - model 921040
Town is online now  
post #14 of 35 Old 04-12-2018, 08:39 AM
Senior Member
 
JLawrence08648's Avatar
 
Join Date: Jan 2017
Location: Lawrenceville NJ
Posts: 2,110
Post Thanks / Like
Thanks (Given): 88
Thanks (Received): 174
Likes (Given): 68
Likes (Received): 406
Garage
Have you gone to Amazon and typed in the size you want, width 1/2" x 42", I found several, D&D Power Drive makes an excellent and accurate size belt, $5.12 with free shipping.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
JLawrence08648 is offline  
Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
Likes Town liked this post
post #15 of 35 Old 04-12-2018, 10:32 AM
Senior Member
 
1132le's Avatar
 
Join Date: Feb 2017
Location: ma
Posts: 1,124
Post Thanks / Like
Thanks (Given): 26
Thanks (Received): 81
Likes (Given): 59
Likes (Received): 178
Garage
town check out this link you can put in stock part numbers some list the same belts a a lil diff od
my part number or yours dont show up to give you length i had to dig for what seemed like 2 weeks 2 find your length still cant find mine
that 38 inch belt was the same as my oh358sa 13 hp i think you are way off stock anything now with the lct crank height and a larger pulley

Main Belts Sizes Reference

Here is and ariens 42 inch on flebag

https://www.ebay.com/p/OEM-Ariens-Gr...200/1837577342

have and autoparts store measure your belt with there belt tool

Last edited by 1132le; 04-12-2018 at 10:51 AM.
1132le is online now  
Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
Likes Town liked this post
post #16 of 35 Old 04-12-2018, 10:34 AM
Senior Member
 
Join Date: Jan 2016
Location: Lakeville Ma
Posts: 1,629
Post Thanks / Like
Thanks (Given): 61
Thanks (Received): 156
Likes (Given): 52
Likes (Received): 548
I have a long belt that is cut and I wrap around the pulleys, mark it with chalk to measure how long...then go buy one that length....
Lawn tractor deck belts are LONG......
cranman is online now  
Post Thanks / Like - 1 Thanks, 1 Likes, 0 Dislikes
Thanks Town thanked for this post
Likes Shaw351 liked this post
post #17 of 35 Old 04-13-2018, 02:11 PM Thread Starter
Senior Member
 
Join Date: Jan 2015
Location: Ottawa, Ontario, Canada
Posts: 713
Post Thanks / Like
Thanks (Given): 48
Thanks (Received): 100
Likes (Given): 56
Likes (Received): 99
Many thanks for all your help.

My dealer measured my 07200703 belt at 41.5" using a belt length guide fixture. That is the same length that I measured with a flexible tape around the circumference. So a Bolens/MTD 1716570 (pair of 1/2" X 42.5") belts would work for the 3.25" pulley.

Machine shop could not increase pulley diameter to 3" or more. The owner suggested a place (Industrial Solutions in Ottawa) that sells pulleys, and to use a sleeve over crank extension and a double pulley fitted over the sleeve. So I will see about that solution.

2015 Ariens Platinum 30 SHO - model 921040
Town is online now  
post #18 of 35 Old 04-17-2018, 01:40 PM Thread Starter
Senior Member
 
Join Date: Jan 2015
Location: Ottawa, Ontario, Canada
Posts: 713
Post Thanks / Like
Thanks (Given): 48
Thanks (Received): 100
Likes (Given): 56
Likes (Received): 99
There is no available pulley setup that I can find or a professional dealing in pulleys can find to match the offset Ariens dual pulley assembly.

2015 Ariens Platinum 30 SHO - model 921040
Town is online now  
post #19 of 35 Old 04-17-2018, 04:04 PM
Senior Member
 
Join Date: Jun 2014
Location: Shoreline, CT
Posts: 3,446
Post Thanks / Like
Thanks (Given): 103
Thanks (Received): 375
Likes (Given): 466
Likes (Received): 477
There are a couple of machinists on the forum, maybe one of them is willing to come up with something.... We’ll see...
YSHSfan is online now  
Post Thanks / Like - 1 Thanks, 0 Likes, 0 Dislikes
Thanks Town thanked for this post
post #20 of 35 Old 04-18-2018, 09:54 AM Thread Starter
Senior Member
 
Join Date: Jan 2015
Location: Ottawa, Ontario, Canada
Posts: 713
Post Thanks / Like
Thanks (Given): 48
Thanks (Received): 100
Likes (Given): 56
Likes (Received): 99
Quote:
Originally Posted by YSHSfan View Post
There are a couple of machinists on the forum, maybe one of them is willing to come up with something.... We’ll see...
Thanks for your support.

The closest I can come to a solution would be to machine off the current 2.75" pulleys and reduce the shaft diameter from 1.7" to 1.625" to accommodate two weld on pulleys of 3.5" outside diameter and 1.625" inside diameter. There may need to be a shoulder between the two pulleys and the rolled outer edges of the steel pulleys may be too wide. The resulting impeller speed will be 1,439 rpm which is much higher than targeted and will create a belt length increase of 1.2" from 41.5" to about 42.5" approx based upon db130 input providing I increase the tensioner slot to create more belt slack when clutch disengaged. I have the Pro pulley on my machine now so the Platinum pulley will be used to check out any design ideas.

There are a number of issues in increasing the engine auger pulley diameter from 2.75" to 3" or 3.25":

1. Duplicating the SHO pulley assembly through machining is very difficult due to the internal fixed keyway in the assembly for the crank drive;

2. Machining the dual pulley off the assembly leaves a max shaft dia of 1.7" where the smallest pulley that will fit is 3.5" outside diameter and 1.625" inside diameter;

3. Machining the dual pulley off the assembly to fit a pulley of 3" to 3.25" will require a very small shaft diameter and make the metal too thin (based upon expert input);

4. A shaft of 3.325" length for a 1" diameter crank with internal keyway does not currently exist according to the experts so you cannot attach a suitable double pulley of 3" to 3.25" outer diameter.

Here are some pics of the pulley:







Attached Thumbnails
Click image for larger version

Name:	Pulley crank end.jpg
Views:	62
Size:	195.8 KB
ID:	142930   Click image for larger version

Name:	Pulley from pulley end .jpg
Views:	68
Size:	119.7 KB
ID:	142938   Click image for larger version

Name:	Pulley overall view.jpg
Views:	78
Size:	206.9 KB
ID:	142946   Click image for larger version

Name:	SHO engine pulleys.jpg
Views:	66
Size:	262.6 KB
ID:	142954  

2015 Ariens Platinum 30 SHO - model 921040
Town is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Snowblower Forum : Snow Blower Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome