I need a single V-groove alternator pulley

[Whisler]

Obviously I was very unclear in what I needed or was trying to convey.

You measured the pulley front to back at 1 5/8" overall width, with 27/32" recess and 1/8' lip on the back.

What I was trying to say is that I need the distance measured from the face of the recess to the back of the lip to be 11/16". Converting to metric, overall width is 1.625" minus 0.844" recess makes the current distance from face of recess to back of lip to be 0.781. This is assuming your overall width was including the lip.

I need the distance from the face of the recess to the back of the lip to be 0.688" (or 11/16) or stated another way I need the recess deepened by about 0.1". The lip needs to stay to space the pulley off the alternator case. Nothing else about the pulley needs to be changed.

I hope that makes better sense. If not let me know.

I think my long-winded explanation above still isn't very clear. All I would need is for the pulley recess to be deepened so that the measurement from the face of the recess, through the hole, to the end of the lip is 11/16".

I came up with this number this way. I had a serpentine pulley that allowed me to get the bolt far enough onto the shaft for safety, so I laid it down on a flat surface and measured through the hole from the face of recess to the flat surface and it was 11/16. That same measurement with your pulley should be fine.

Hope this is more clear.

I appreciate this greatly. Thank you

 

[ArdWrknTrk]

Obviously I was very unclear in what I needed or was trying to convey.

You measured the pulley front to back at 1 5/8" overall width, with 27/32" recess and 1/8' lip on the back.

What I was trying to say is that I need the distance measured from the face of the recess to the back of the lip to be 11/16". Converting to metric, overall width is 1.625" minus 0.844" recess makes the current distance from face of recess to back of lip to be 0.781. This is assuming your overall width was including the lip.

I need the distance from the face of the recess to the back of the lip to be 0.688" (or 11/16) or stated another way I need the recess deepened by about 0.1". The lip needs to stay to space the pulley off the alternator case. Nothing else about the pulley needs to be changed.

I hope that makes better sense. If not let me know.

Whisler,

If you use a flange nut instead of a nut *and* washer the threads start with your 'washer'.

Mine hasn't slipped even though the 3G shaft is shorter than the old alternator.

I was a little iffy about not having threads projecting from the nut but it seems okay in my case.

 

[Whisler]

Whisler,

If you use a flange nut instead of a nut *and* washer the threads start with your 'washer'.

Mine hasn't slipped even though the 3G shaft is shorter than the old alternator.

I was a little iffy about not having threads projecting from the nut but it seems okay in my case.

I'm OK with no threads actually projecting from the front of the nut, but with my pulley I can only catch about 2 threads before bottoming out in the recess. If I could get enough thread engagement to bring the the shaft out level with end of the nut, I would be fine. Therefore, I need the recess deepened.

I need the portion of the hub of the pulley that would be in actual contact with the alternator shaft to be 11/16 long, including the lip. Deepening the recess maybe needed. Laying the pulley on the lip, on a flat surface and measuring through the hole, from the flat surface to the inside face of the recess is the crucial measurement.

I think that I misunderstood some of Gary's measurements. When he said the recess was 27/32", I took that to be depth but I think he meant diameter. I don't know the depth of the recess on Gary's pulley or if his front to back measurement (thickness) included the lip, so all my spouting of math in my other post is of no use.

[Gary Lewis]

I'm OK with no threads actually projecting from the front of the nut, but with my pulley I can only catch about 2 threads before bottoming out in the recess. If I could get enough thread engagement to bring the the shaft out level with end of the nut, I would be fine. Therefore, I need the recess deepened.

I need the portion of the hub of the pulley that would be in actual contact with the alternator shaft to be 11/16 long, including the lip. Deepening the recess maybe needed. Laying the pulley on the lip, on a flat surface and measuring through the hole, from the flat surface to the inside face of the recess is the crucial measurement.

I think that I misunderstood some of Gary's measurements. When he said the recess was 27/32", I took that to be depth but I think he meant diameter. I don't know the depth of the recess on Gary's pulley or if his front to back measurement (thickness) included the lip, so all my spouting of math in my other post is of no use.

You were right, the recess is 27/32" deep. I'm going out to the shop in a bit and will chuck the pulley up and see 'bout making it deep enough that the total shaft engagement is 11/16".

I'm moving slowly this morning. Think the celebratory eating caught up with me. Or the late bed time, which was caused by the nap yesterday afternoon, might have been part of the problem. In any event, I'm on my second cup of Starbucks and enjoying the slow morning.

[Whisler]

You were right, the recess is 27/32" deep. I'm going out to the shop in a bit and will chuck the pulley up and see 'bout making it deep enough that the total shaft engagement is 11/16".

I'm moving slowly this morning. Think the celebratory eating caught up with me. Or the late bed time, which was caused by the nap yesterday afternoon, might have been part of the problem. In any event, I'm on my second cup of Starbucks and enjoying the slow morning.

Did your front-to back measurement of 1 5/8" include the 1/8" lip?

If so, then the recess needs to be deepened by 3/32". If not, then it needs to be deepened by 7/32". But please check my math; I have been sick for a week and may not be thinking clearly.

Thanks again for all this.

[Gary Lewis]

Did your front-to back measurement of 1 5/8" include the 1/8" lip?

If so, then the recess needs to be deepened by 3/32". If not, then it needs to be deepened by 7/32". But please check my math; I have been sick for a week and may not be thinking clearly.

Thanks again for all this.

Yes, I included the lip in my measurement.

But, let's start over. With the pulley front-up on the table, I measure 3/4" (.754" actually) from the rear of the recess to the back of the lip. And you want it to be a max of 11/16"?

[Whisler]

Yes, I included the lip in my measurement.

But, let's start over. With the pulley front-up on the table, I measure 3/4" (.754" actually) from the rear of the recess to the back of the lip. And you want it to be a max of 11/16"?

You are correct.

Sounds like your pulley was much closer to what I needed than what I had.

Talking about coffee made me want a cup, so i think I'll go have one. Hope you enjoyed yours. Now if I could just stop coughing I could enjoy one myself.

Your generosity is much appreciated.

[Gary Lewis]

You are correct.

Sounds like your pulley was much closer to what I needed than what I had.

Talking about coffee made me want a cup, so i think I'll go have one. Hope you enjoyed yours. Now if I could just stop coughing I could enjoy one myself.

Your generosity is much appreciated.

Ok, let's make sure this thing is what you want. As shown below, my math says originally the bottom of the recess to the back of the lip was .754". And 11/16" = .6875", so the amount to take off is .0665". Right?

I wound up at .684", but if that's too short I can send you the shavings so you can glue them back on.

Anyway, if this is what you want just click on my name and send me an email with your address. I'll get it out tomorrow. If not, what changes do you need?

Oh, and here's a shot while I was machining it.

[ArdWrknTrk]

Ok, let's make sure this thing is what you want. As shown below, my math says originally the bottom of the recess to the back of the lip was .754". And 11/16" = .6875", so the amount to take off is .0665". Right?

I wound up at .684", but if that's too short I can send you the shavings so you can glue them back on.

Anyway, if this is what you want just click on my name and send me an email with your address. I'll get it out tomorrow. If not, what changes do you need?

Oh, and here's a shot while I was machining it.

Gary, I was sure that pulley would come in handy.

-This pulley was made for this application-

Thanks so much for paying it forward and helping out a forum participant.

You are a real stand up guy!

(That's about all I can do without a rep button)

[Gary Lewis]

Gary, I was sure that pulley would come in handy.

-This pulley was made for this application-

Thanks so much for paying it forward and helping out a forum participant.

You are a real stand up guy!

(That's about all I can do without a rep button)

It is the thought that counts, Jim. You gave it to me, so it is the least I could do.

Note that I actually enlarged the recess at its base. Apparently the folks doing the CNC work on these at the factory were in a hurry and pushed the limits of their boring bar, and it flexed when they got to the bottom. I took off very small amounts since I was only taking off .067" and didn't have any flex. So, the recess is now a bit truer.