The Ford Barn

nkaminar · 11-29-2023, 07:57 PM

I just ordered a cogged fan belt from McMaster Carr. It is 43 inches outside circumference and 21/32 wide at the top. I like the fact that it is 1/32 wider than the stock 5/8 because it will accommodate worn pulleys. McMaster Carr is expensive and the shipping is too so I try to buy more than just one thing at a time.

The cogged belts are original type and will bend easier around smaller alternator pulleys.

https://www.mcmaster.com/6057K117/

Synchro909 · 11-29-2023, 09:54 PM

Quote:

Originally Posted by nkaminar

I just ordered a cogged fan belt from McMaster Carr. It is 43 inches outside circumference and 21/32 wide at the top. I like the fact that it is 1/32 wider than the stock 5/8 because it will accommodate worn pulleys. McMaster Carr is expensive and the shipping is too so I try to buy more than just one thing at a time.

The cogged belts are original type and will bend easier around smaller alternator pulleys.

https://www.mcmaster.com/6057K117/

Neil, By my experience, you are exactly right about the need for a cogged belt on an alternator and the wider belt being better. Even with one of the wider belts, I found that with a worn pulley, the "teeth" of the belt were still running on the base of the Vee and that made a terrible noise. I turned the belt inside out and ground a little off the teeth. End of problem.

Mulletwagon · 11-29-2023, 10:33 PM

The most popular cogged belt is part number BX40.

BillCNC · 11-30-2023, 01:02 AM

Quote:

Originally Posted by Synchro909

I found that with a worn pulley, the "teeth" of the belt were still running on the base of the Vee and that made a terrible noise. I turned the belt inside out and ground a little off the teeth. End of problem.

I thought I was loosing my water pump until I noticed the belt's teeth were leaning in one direction so I bought a new BX40 and the sound was gone. I'll try your method of shaving the tooth height down with a flapper wheel on the old BX40 only because the price of them is insane. About a buck an inch.

Regards
Bill

Y-Blockhead · 11-30-2023, 01:02 AM

I usually get my belts and such from RockAuto. I like the Dayco belts "Double Cog".

Rock Auto has ignition and other parts for Model A also.

dennis lumbert · 11-30-2023, 02:17 PM

Sponsored Links (Register now to hide all advertisements)

I bought a brand new BX 40 Gates belt on eBay for 16.95 and free shipping.

JayJay · 11-30-2023, 04:04 PM

I get my cogged belts from NAPA. They have to order them for me for next day delivery but no issue with availability.

updraught · 11-30-2023, 05:01 PM

Rockauto are good to deal with for international shipping. You can mix and match parts to fill a box from location A or B to optimise cost. If they send the wrong thing, they will pay for shipping back. Mostly use it for plugs and timing belt kits for modern vehicles. My brother in law has discovered it for his Volt.

johnneilson · 12-01-2023, 08:15 PM

One reason that *x belts are more expensive is the length(s) are very tightly controlled.
These are made to be used in multiple belt applications for higher HP.
They do work well for the small pulleys that the alternators need.

John

nkaminar · 12-01-2023, 08:27 PM

The one from McMaster Carr is the same as the BX40.

Bruce of MN · 12-02-2023, 07:21 AM

Rock Auto offerings are pretty cheap (I need the extra length, so it is a BX41)

Sorry about the small print! The Gates is $13.21.

JayJay · 12-02-2023, 09:34 AM

Quote:

Originally Posted by Bruce of MN

Rock Auto offerings are pretty cheap (I need the extra length, so it is a BX41)

Sorry about the small print! The Gates is $13.21.

I use BX42, BX40 doesn’t fit. Didn’t know there was a BX41!

11-29-2023, 07:57 PM	#1
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,900	Cogged fan belt I just ordered a cogged fan belt from McMaster Carr. It is 43 inches outside circumference and 21/32 wide at the top. I like the fact that it is 1/32 wider than the stock 5/8 because it will accommodate worn pulleys. McMaster Carr is expensive and the shipping is too so I try to buy more than just one thing at a time. The cogged belts are original type and will bend easier around smaller alternator pulleys. https://www.mcmaster.com/6057K117/ __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

11-29-2023, 10:33 PM	#3
Mulletwagon Senior Member Join Date: Jan 2019 Location: Florida Panhandle Posts: 585	Re: Cogged fan belt The most popular cogged belt is part number BX40.

11-30-2023, 01:02 AM	#5
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: Cogged fan belt I usually get my belts and such from RockAuto. I like the Dayco belts "Double Cog". Rock Auto has ignition and other parts for Model A also.

11-30-2023, 02:17 PM	#6
dennis lumbert Senior Member Join Date: Feb 2011 Location: central Arkansas Posts: 150	Re: Cogged fan belt Sponsored Links (Register now to hide all advertisements) I bought a brand new BX 40 Gates belt on eBay for 16.95 and free shipping.

11-30-2023, 04:04 PM	#7
JayJay Senior Member Join Date: Jan 2020 Location: SF Bay Area Posts: 1,077	Re: Cogged fan belt I get my cogged belts from NAPA. They have to order them for me for next day delivery but no issue with availability. __________________ JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan

11-30-2023, 05:01 PM	#8
updraught Senior Member Join Date: Feb 2015 Location: Australia Posts: 1,971	Re: Cogged fan belt Rockauto are good to deal with for international shipping. You can mix and match parts to fill a box from location A or B to optimise cost. If they send the wrong thing, they will pay for shipping back. Mostly use it for plugs and timing belt kits for modern vehicles. My brother in law has discovered it for his Volt.

12-01-2023, 08:15 PM	#9
johnneilson Senior Member Join Date: Jun 2010 Location: 34.22 N 118.36 W Posts: 1,057	Re: Cogged fan belt One reason that *x belts are more expensive is the length(s) are very tightly controlled. These are made to be used in multiple belt applications for higher HP. They do work well for the small pulleys that the alternators need. John __________________ As Carroll Smith wrote; All Failures are Human in Origin.

12-01-2023, 08:27 PM	#10
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,900	Re: Cogged fan belt The one from McMaster Carr is the same as the BX40. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

12-02-2023, 07:21 AM	#11
Bruce of MN Senior Member Join Date: May 2010 Location: VA Posts: 1,410	Re: Cogged fan belt Rock Auto offerings are pretty cheap (I need the extra length, so it is a BX41) Sorry about the small print! The Gates is $13.21.