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Build Your Own Prop Puller

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Grand Poobah
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    Posted: February-23-2009 at 9:16pm
MI-nick - You might want some more weld on that nut, looks like the weakest link.

Otherwise it looks like it should pull hard!
“Beer is proof that God loves us and wants us to be happy.”

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Post Options Post Options   Thanks (0) Thanks(0)   Quote MI-nick Quote  Post ReplyReply Direct Link To This Post Posted: February-23-2009 at 3:16pm
I made my puller last weekend. I made two changes from Bill's design.
1) puller "claw" from 2 piece to 1 piece. I think it's a little stronger this way.
2) increased width of the puller body from 1" -> 2" (increased resistance to bending).
I also made a jig to keep the claw and the nut in alignment during welding. I drilled the center of the bolt, but still need to add a steel rod to keep the bolt centered on the prop shaft. I wanted to add some more weld/reinforcement to the nut area (i think this is the weak link) but ran out of sheilding gas and the welding supply store was closed. I think it came out pretty good.
Thanks Bill for how-to!!

Puller Body

Jig with claw tacked on

Tacking jig to puller body

Welding claw and nut

Finished Product


What my backyard looked like that day
As far as I can tell, I'm not quite sure...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MI-nick Quote  Post ReplyReply Direct Link To This Post Posted: February-19-2009 at 3:37pm
Pete,
I like your puller. I agree it probably puts a more uniform load on the prop hub. But, Bill's puller fit's my needs better (mainly from a manufacturing standpoint...i don't have the resources to easily build one like your's the way it should be built).
I think if Bill's style is aligned correctly and the puller body is as rigid as possible, the uneven load on the prob hub (and bending of the puller) can be minimized. Many of this style have been used successfully and this is also the style the major prop manufactures sell...so it must be at least adequate...
I though about calculating the max bending moment on the puller using the stripping torque for a 3/4-10 grade 8 nut and designing for min deflection...but, I think "seat of the pants" engineering is Ok for this job. I may increase the thickness from 1/4" to 5/16" or even 3/8" and i'll definitely add gussets where possible. I'll let you guys know how it works out.
As far as I can tell, I'm not quite sure...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: February-17-2009 at 10:18am
I use to be the first to jump at projects, then i find myself pulling in at 10:00 at night, you know my friend left me this car and it really is one of a kind but it needs some work and Im committing 2 hours a night to it...somehow, someway he is looking down with a smerk, it really is the last thing i need to be doing, Im hoping to have it done by July for a road trip North to Kringle land
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: February-17-2009 at 10:06am
Originally posted by eric lavine eric lavine wrote:

BTW, pete, one of your guys build that puller on the clock?


No Eric, I don't have that luxury. I wish I did because it sure would help on all the projects I get into!!

Nick,
I'd like to add that welding on a forged "C" clamp and a grade 8 nut will draw the temper out. If you do make your own, it should be heat treated after welding otherwise it will stretch easily.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: February-16-2009 at 11:31pm
BTW, pete, one of your guys build that puller on the clock?
"the things you own will start to own you"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: February-16-2009 at 11:26pm
Pete, im built for speed, slowin up a little but still running circles around the shop pups, one positive thing i could add is when pulling any prop leave the nut on....you'll figure out why if you get a real tight one

have to edit cause i know someone is scratching thier noggin, loosen the nut first and back it off a few threads
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: February-16-2009 at 10:41pm
Nick,
I haven't commented on Bill's (skibum) thread because I admire him going to the trouble of building his puller and didn't want to insult him in anyway.

Your profile states you're a engineer so you may appreciate what it sometimes takes to pull a prop off it's taper. (especially if Eric has put it on with his impact wrench!!)

I have never been a fan of "C" clamp type pullers. They really pull from one side and put unequal pressure on the hub. This is especially true after you've used them a couple times and they are stretched out. I'm sure you have a few regular C clamps that have been overloaded!! If you are going to the trouble of making your own puller, take a look at the one I made. I posted it before I believe you became a CCfan'r. You'll notice it's drilled for ether 3 or 4 bolts so it can be used for ether a 3 or 4 blade prop. The "C" puller is however very convenient to use - with mine, you do have to fiddle around with the bolts and the plates.





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Post Options Post Options   Thanks (0) Thanks(0)   Quote MI-nick Quote  Post ReplyReply Direct Link To This Post Posted: February-16-2009 at 4:04pm
Bill,
How did you line up the nut before welding??
Some type of jig or just eyeball it??
I plan to build one this weekend.
Thanks
As far as I can tell, I'm not quite sure...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: December-16-2008 at 11:10am
Thanks.

I have been talking with the Doc.

My house in KY still has not sold. Looks like I'll be heading out there by myself.

Bill
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www.freewebs.com/billsboatworks 1987 SN Rebuild Project
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bradtm16 Quote  Post ReplyReply Direct Link To This Post Posted: December-11-2008 at 1:22pm
Bill, I'm about an hour from Fort Polk and the Boat Dr. is about 2 hr from Fort Polk. Shoot me an email if you need help finding anything around here. Bradtm16@yahoo.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-12-2008 at 11:58am
Thanks to all.

Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: November-11-2008 at 7:55am
Bill,
Your choice of boat doesn't exclude you from the CCfan family. You need to visit us more!!


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbear Quote  Post ReplyReply Direct Link To This Post Posted: November-11-2008 at 3:58am
Well the boat dr is around there somewhere.

Of course you know you are always welcome and respected here Bill....regardless of present boat choice. Your thread is the book many follow for stringer replacement.

Veterans Day...thanks Skibum!

john
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 9:47pm
It is unfortunate that my old boat is sitting at a shop, again. My family and I really liked that boat. It was just not the slalom tow boat that I wanted. After I sold it, I tried to find a nice Ski Nautique, with the upgraded hull and fuel injection, that I could afford.

I ended up with a '95 Prostar 190, fuel injected. So I have been a bit leary of saying much over here. I know how some folks feel about MC.

Anyhow, over time I have corresponded with a few fans who looked me up through my diaries. Nice to be able to help somebody out once in a while.

Good to, in effect, see some old friends. You are the best.

I am being reassigned to Ft. Polk, LA. Anybody from them parts?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 9:36pm
This is the finished product. Well, still needs to be painted or finished somehow.

I welded additional support along the length of the 1/4" weld steel to help reduce twisting.

Anyhow, the cost of materials was well under $20 and it is a quality prop puller.

Like Jetski180 said, you can do this with a C-clamp as well. That is how I made the first ones.

Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 9:32pm
I bought a different 3/4" dia grade 8 bolt. This one is 2-1/2" long and threaded all of the way to the head.

I first located the center, then punched it. I drilled a hole about 3/8" deep in the center of the bolt. I hammered in a stainless steel screw. Then I cut off the head of the screw and filed it into a cone shape.

This should fit into the hole on the back of the driveshaft and keep the puller aligned.

Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jetski180 Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 1:23pm
That is a great post on how to make a Prop Puller. I also made a prop puller about a year ago. I found that if you purchase a C-Clamp and put a U-Shaped piece of steel like SkiBum did it works just as well. This will cost a little more than the above Prop Puller but will save you some time too. If you have a Harbor Freight near by you can get a C-Clamp for under $10.00. I will try and post a picture of it shortly.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote The Lake Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 10:16am
Bill,

Good to see a post from you again. Hope things are well with you.

Sons, 16, and wrecks . . . they go together like birds of a feather. Glad all are OK.

Chuck
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbear Quote  Post ReplyReply Direct Link To This Post Posted: November-10-2008 at 12:08am
I happen to have one of these pullers and it works great. Thanks again Bill.

Haven't seen you on much. Where are you now and doing what...if you don't mind me asking.

Any boat plans in the works?

Had a 16 year old once...what a time in life. Glad the wreck wasn't worse.

Take care!

john
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shawnmc Quote  Post ReplyReply Direct Link To This Post Posted: November-09-2008 at 11:51pm
bill,
good to see ready your post again. I saw your old boat at a boat shop in Lebanon, TN 3 months ago. As soon as I saw it, I remembered it from this site.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-09-2008 at 7:38pm
Good news is that nobody was injured. Here's a pic.

Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SNobsessed Quote  Post ReplyReply Direct Link To This Post Posted: November-09-2008 at 12:14pm
Great post Bill, I might habve to build one of these just to fill the wintertime hobby void.

I hope your son is OK, cars can be replaced.

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I always enjoy your work Bill. Seem to be pretty calm about the whole car thing. Perhaps I will be able to maintain my calm by the time my daughter reaches 16.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-08-2008 at 11:24pm
The puller is not actually finished. When I got to this point, I got a phone call. Seems that my 16 year old son wrecked one of our cars. But, that is another issue.

Anyhow, what is needed is to put something on the end of the bolt to keep it on the end of the prop shaft while tightening. In the past I have used another nut. I ground away all of the exposed grooves after welding it to the end of the bolt.

Also, I have just enough room on my boat for this to fit. But, the 3/4" by 3" grade 8 bolt may be too long. It would be best to use a 2" long bolt with all threads.

When I get over the problem of my son destroying my car, I'll get back to work on this. But that should be enough for you to get started.

A quality prop puller for less than $20.00.
Bill
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SkiBum Quote  Post ReplyReply Direct Link To This Post Posted: November-08-2008 at 11:19pm
9 of 9

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8 of 9

NOTE: I traced a two inch diameter circle onto the steel. In the center, I traced a one inch diameter circle. At one end I marked the thickness of the steel. Then I cut the circle in half in one direction. I then cut out the one inch diameter circles from each half. Again, I beveled the edges of the pieces before welding them into place.

In the other picture, I found a socket with an outside diameter of 1.027 inches. I used it a a jig to trim the halves before welding them into place.

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7 of 9

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6 of 9 NOTE: Be sure to bevel the edge of the steel before welding. And, weld the nut on edge, not one of the flat surfaces. This will give a much better weld.

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5 of 9

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