Need a stepped V belt pulley,,,,
#2668117
06/20/19 08:13 PM
06/20/19 08:13 PM
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Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I am trying to mount an alternater to my already crowded engine . Right now i have a crank trigger, then a spacer and drive manderal, which is keyed and 5/8 diameter. On the manderal is a cogged pulley to drive the injection pump, then a. 3 1/2 inch V belt pulley to drive the vacuum pump. I need a double V belt pulley, 5/8 keyed shaft, 3 1/2inch inside for the vacuum pump, 5 inch outside to drive the alternater. There is no room for the extra width area for the set screw to butt up against the cogged pulley . If i want to mount the alternater as the drive belt being the farthest out on the drive manderal, i need a weird pulley with a 3 1/2 diameter, then a 5 inch diameter, then the step for the set screw, with a 5/8 shaft and keyway. I have tried to come up with other ways to mount this alternater, but there is only one spot left to put it. I have thought of ways to create the pulley i need, like having one custom machined, but am asking if there are other possible solutions to this mess?
EDIT. DOH! HOMER moment! I can space the vacuum pump forward enough that i can use a regular configuration stepped pulley, if any body makes what i need. V belt, stepped two grove, 3 1/2 inch and 5 inch, 5/8 shaft, keyed. Any one know of a source for a light aluminum one that can handle the load of an alternater, and a vacuum pump? Max rpm, 7600.
Last edited by gregsdart; 06/20/19 08:49 PM.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: gregsdart]
#2668128
06/20/19 08:44 PM
06/20/19 08:44 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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You need a double (5.5" & 3" grooves) crank pulley? You may have to bolt/weld 2 of em together.
live every 24 hour block of time like it's your last day on earth
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Re: Need a stepped V belt pulley,,,,
[Re: RapidRobert]
#2668130
06/20/19 08:54 PM
06/20/19 08:54 PM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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RR, i may have to resort to that. Most of what i have found are too eak to handle a big load. As it is, i had to fill the 3 1/2 cast unit i use for the vacuum pump with epoxy to keep them from cracking and failing.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: gregsdart]
#2668184
06/20/19 11:17 PM
06/20/19 11:17 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
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Milwaukee WI
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If you can send me an accurate drawing, i can give you a quote on a pulley. Being a 5/8 keyed drive, I would suggest 7075 as material. Alternator mass being driven by a 5/8” shaft on a 5” pulley would be extremely hard on the key way. 6061 would most likely oogle out the key in a short time. Material can get expensive. 7075 material cost about 44.00 per inch of length on a 5” round. By comparison, 6061 is about 18.00 per inch.
Last edited by TRENDZ; 06/20/19 11:26 PM.
"use it 'till it breaks, replace as needed"
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Re: Need a stepped V belt pulley,,,,
[Re: TRENDZ]
#2668193
06/20/19 11:49 PM
06/20/19 11:49 PM
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Joined: Jan 2003
Posts: 4,329 Morrow, OH
markz528
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master
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Morrow, OH
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I am struggling to get an accurate mental picture of your setup.
As an FYI - this is my setup. I made the pulleys and they are bolted together.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Need a stepped V belt pulley,,,,
[Re: markz528]
#2668480
06/21/19 06:38 PM
06/21/19 06:38 PM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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A couple of pics of my stuff. I am going to check and see if i can get a larger diameter shaft and pulley for the injection. That should help the situation some.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: Blucuda413]
#2669098
06/23/19 05:51 PM
06/23/19 05:51 PM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I found a 6 inch vacuum pump pulley by STEFF online. That would allow the use of a double 5 inch pulley, with a max speed of 6100 rpm for the vac pump, 15,000 for the alternater. That helps, with a lot more options. I am checking tomorrow on a larger diameter drive manderal to help with the load on the pulleys' keyway. EDIT; I have been forced to build a new drive manderal with a 1 inch shaft to gaurantee this piece will be strong enough. I plan on using the spacer shown, but will make a new manderal .
Last edited by gregsdart; 06/25/19 09:29 PM.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: gregsdart]
#2670120
06/26/19 10:19 AM
06/26/19 10:19 AM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Update; A 6 inch long 1 inch diameter keyed shaft is on the way from Grainger. 24 hour delivery is pretty good! Also have a 14 tooth by 1 inch bore drive sprocket for the fuel pump on the way. I have a friend that is cutting me plates to weld onto the shaft to make it a mandrel, using a laser cut machine. The last piece of the puzzle is the two grove pully I need. Best option is for a 4 inch plus 5 inch, with the set screw part on the 5 inch side of the pulley. I see I have a message on that ,maybe a quote?
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: HardcoreB]
#2670920
06/27/19 10:32 PM
06/27/19 10:32 PM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Thanks HB, will PM if I need help.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Need a stepped V belt pulley,,,,
[Re: gregsdart]
#2672260
07/01/19 08:03 AM
07/01/19 08:03 AM
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Joined: Jan 2003
Posts: 10,085 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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Posting a picture of what i am up to
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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