Page 1 of 2 1 2 LastLast
Results 1 to 10 of 15
  1. #1

    would this for pump alignment

    hi guys,

    i saw a 3 ft. 20 mm. rod on ebay.would this work for aligning the pump?if not does http://cgi.ebay.com/Linear-Motion-Sh...item1c119a1000anybody have any for sale? thanks


  2. #2
    Quote Originally Posted by bigmatt View Post
    hi guys,

    i saw a 3 ft. 20 mm. rod on ebay.would this work for aligning the pump?if not does http://cgi.ebay.com/Linear-Motion-Sh...item1c119a1000anybody have any for sale? thanks

    No. The end of the shaft has to be turned down to 18mm. The rest of it is 20mm.

  3. #3
    Does anybody on here have any for sale?
    thanks

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,596
    +1
    1,276
    Quote Originally Posted by bigmatt View Post
    Does anybody on here have any for sale?
    thanks
    Call Randy at Watcon.com

  5. #5
    ok thanks....aren't they about 150 bucks?

  6. #6
    johnsonmtz's Avatar
    Join Date
    Oct 2006
    Location
    Mt. Zion Illinois
    Posts
    1,250
    +1
    7
    Quote Originally Posted by bgaidan View Post
    No. The end of the shaft has to be turned down to 18mm. The rest of it is 20mm.
    What about asking a local machine shop how much it would cost to turn the last 3" or 4" down to 18mm diameter? I wouldn't think they would charge much more than $25 for them to take less than 30 minutes and throw this on a lathe.

    So, $25 for the shaft, $25 to turn it, $10 shipping........$60 for a pump alignment tool doesn't sound too bad.

    KJ

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,596
    +1
    1,276

    Arrow Drive shaft & jet pump alignment tool specification

    Quote Originally Posted by johnsonmtz View Post
    What about asking a local machine shop how much it would cost to turn the last 3" or 4" down to 18mm diameter? I wouldn't think they would charge much more than $25 for them to take less than 30 minutes and throw this on a lathe. ...
    Beware of the rather tight tolerances spec'ed for the alignment tool.

    The alignment tool specifications were posted somewhere around here, but I cannot seem to locate them at the moment
    I seem to recall it was in an attachment drawing...

    Edit: Found the alignment tool spec from Beerdart;
    Alignment tool 20mm + 0 - .0005"
    Turn down one end to .710 for 2"

    Length is about 36 inches, give or take.

    The problem is that the tool slides through the bearings in the stator. It must not sag as it then slides towards the engine. My own tool is so snug that if the shaft is not lightly oiled, it will bind in the stator bearings!

    There is a rather long distance from the stator to the engine coupler, so any slop where it passes through the stator bearings, or warpage in the tool, will result in the alignment being inaccurate.

    The spec beerdart posted means 1/2 of a thousandth of an inch accuracy over the length of the tool. That is a really, really tight tolerance.

  8. #8
    yes,i thought about it having it ground down myself.447 are you sayingthat it might be to big to slide through the stator?

  9. #9
    FLjoyrider's Avatar
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    555
    yea if the tolerances on the stock are +/- .005" that means it could be too big or too small. 90% of the time too big. I got a shaft and thought I could turn down the end.. well I did, then I slid the shaft into my pump and couldn't get it off. I even sanded the crap out of it and smoothed it down on the lathe with emery cloth.. but after it bound up the first time it galled the shaft up so bad every set of bearings I slide on there go half way then get stuck and have to be cut off.. what a pita that was I rented a tool finally and threw the stainless bar I got into the scrap bin. I think if I worked with it more before I bunged it up it might have worked..

    If you do go this route then take a bad bearing and slide it on nice n easy with oil and then use the lathe with some fine emery cloth to finish it down so the bearing slides nice n easy.

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,596
    +1
    1,276
    Quote Originally Posted by K447 View Post
    Beware of the rather tight tolerances spec'ed for ...the alignment tool spec from Beerdart;
    Alignment tool 20mm + 0 - .0005"
    Quote Originally Posted by FLjoyrider View Post
    yea if the tolerances on the stock are +/- .005" that means it could be too big or too small. 90% of the time too big...
    Read the spec posted by beerdart carefully.

    It is plus zero, minus .0005

    minus .0005 is ten times closer to perfect than .005

    Not minus five thou, it is minus 1/2 half thou

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. would this be any good for wave jumping?
    By FL03GTX in forum Sea Doo Open Discussion
    Replies: 11
    Last Post: 12-18-2008, 05:03 PM
  2. ? for electricians; Would this meet code?
    By NCHeel in forum Open Discussion
    Replies: 11
    Last Post: 08-03-2008, 10:29 PM
  3. IC for 07 rxp....would this work?
    By pet in forum 4-Tec Performance
    Replies: 8
    Last Post: 02-23-2008, 10:18 AM
  4. What I would give for this!!!
    By Dark_viper42 in forum Sea Doo Open Discussion
    Replies: 2
    Last Post: 05-30-2007, 08:08 AM
  5. Would this be an ok mod setup for a budget????
    By kenshin89 in forum 4-Tec Performance
    Replies: 13
    Last Post: 05-25-2005, 07:08 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •