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| | | | Joined: Jun 2013 Posts: 148 Shop Shark | | Shop Shark Joined: Jun 2013 Posts: 148 | I want to change the standard 4 blade fan to a 6 blade high output fan. This is a 1954 pu with 235 motor. My problem is with the waterpump hole on the original fan is 1".All the aftermarket ones are much smaller at around 5/8". I want to add a/c next year and I already made a fan shroud. Has anyone found fans to fit over the waterpump pulley?
Thanks
Tony | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | Could you use a drill press and enlarge the 6 blade center hole to fit your water pump?
ðŸ›
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
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USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: Feb 2004 Posts: 29,809 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,809 | Since when is making a hole BIGGER a problem?
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2013 Posts: 148 Shop Shark | | Shop Shark Joined: Jun 2013 Posts: 148 | Well Jerry if I can keep it centered I might give it a try. I could take it to a machine shop. Those are both good ideas, thanks guys
Tony
The fan was only $35 at Summit Racing so that's not much | | | | | Joined: Mar 2010 Posts: 843 Shop Shark | | Shop Shark Joined: Mar 2010 Posts: 843 | “Has anyone found fans to fit over the waterpump pulley?”
Tony,
Is it the water pump pulley or shaft you want the fan to fit over? If it is the shaft and we were neighbors I would suggest either of these options and then we would do one in my home machine shop.
1. Remove the water pump and reduce the diameter of the shaft in front of the pulley to the size of the fan hole using the lathe. That approach is totally doable unless the shaft is hardened. You can determine that by trying to scratch it with a file.
2. Put the fan blade on the milling machine table and center the existing hole under the spindle. Then, using a boring head, bore the hole to the size of the water pump shaft.
Even if you had a 1” drill and a drill press capable of holding it, drilling sheet metal like a fan blade hub generally yields an inaccurate (and often somewhat triangular) hole.
Like all challenges, your has a solution.
Ray
| | | | | Joined: Jun 2013 Posts: 148 Shop Shark | | Shop Shark Joined: Jun 2013 Posts: 148 | Just ordered the fan blade and when it comes in I will take it to a machine shop.
Many thanks fellas
Tony | | | | | Joined: Feb 2004 Posts: 29,809 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,809 | All you need is a drill press and a handful of drill bits. Enlarge the hole 1/16" at a time and the drill will self-center in the previous size hole. Don't go to some sort of ridiculous lengths like some self-appointed know-it-alls suggest. Take your time, be careful and use a little common sense!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2010 Posts: 10,281 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,281 | There is a step drill which is made for sheet metal (different than what Dennis found). It has closer increments of steps and does not catch the sheet metal and destroying the part. They are somewhere around $20-$30 range. Electricians use them for drilling holes in panel boxes. They are nice.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I think your advise is real good Yar. We don't all have 5/8 to 1" drill bits in 1/16 increments.
George
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Mar 2010 Posts: 843 Shop Shark | | Shop Shark Joined: Mar 2010 Posts: 843 | Thanks for the compliment George. I wish Tony were my neighbor so I could help him with this. Even for those of us who do have those big drill bits they don't work very well in sheet metal as the illustrations in those articles show. That's why hole saws and punch presses are used in sheet metal.
It's really fun having a hobby machine and welding shop and benefits my neighbors too. I'm the neighborhood machinist/welder. Other neighbors have a backhoe, tree climbing equipment for serious tree work, computer skills, etc.
Last edited by yar; 07/19/2017 8:13 PM.
Ray
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