This is topic Bristol wrench in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.
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Posted by Tim Sherman (Member # 569) on 03-01-2001, 02:57 PM:
Most of you who have older simplex's probably know what a bristol wrench is. i was just wondering where i could find a couple of these, the price and also what size i need for the collers to change the intermittant spocket. I called about 25 hardware stores today and not one of them had any clue what the tool was. so i am assuming this is a special tool for these machines or is just a very old type of fastener and is now obsolete. So if anyone has any info i would apprieciate it, i need to change out a couple of sprockets. Tim Sherman
Aut-O-Rama Twin Drive-in
North Ridgeville OH
------------------
"Come on out to the drive-in and spend a night out with the stars"
ME!!
Posted by Ken Layton (Member # 133) on 03-01-2001, 03:34 PM:
Any good electronic parts supplier (who sells tools, also) who carries Xcelite Tools should have them.Xcelite has a complete set (they are also known as "spline wrenches") in a small case under part number 99PS-60. There are 9 sizes plus a handle and an extension unit. Yes, the size you need is in that set. You can order just individual sizes from the set. The size you need is the 4-flute # 99-63.
I bought my set in 1984 and it was $25 then, so I would imagine the price has gone up.
Bell & Howell used Bristol set screws exculsively in their 16mm projectors and that's why I bought my set.
Posted by Paul G. Thompson (Member # 655) on 03-01-2001, 09:37 PM:
I bought my last set at Sears. There still should be no problem finding them.
Posted by John T. Mellor (Member # 468) on 03-04-2001, 12:31 PM:
Tim ,
After you get the Bristol set screws out you can use allen socket set screws , thats what is in use now.
When are you opening this season
Regards ,
John
Posted by Paul G. Thompson (Member # 655) on 03-04-2001, 05:53 PM:
Allen screws will work, but the hex heads are so small and allen wrenches are so cheap that the flats on the wrench and set screws will round out very easily. Then you DO have a problem.
Posted by Tim Sherman (Member # 569) on 03-04-2001, 09:05 PM:
John im not really sure yet as to when we are opening for the season, sometime in april is all i know. oh yeah i also took a look at the shutters on the simplexes and found out that i should be able to close them up alittle bit and get alittle more light out. I think that i like that idea of changeing them to allen set screws too. ------------------
"Come on out to the drive-in and spend a night out with the stars"
ME!!
Posted by Paul G. Thompson (Member # 655) on 03-05-2001, 12:24 AM:
If you use Allen Set Screws, please be sure to use high grade. Some of the ones (especially the small ones like you would find in the outboard collar of the older Simplex Intermittant) you get at your local hardware store may be made of soft iron, and will definately strip the flats when you tighten them. Generally, I found that the hex allen screw cannot be tightened as securely as the Bristol without stripping the head and/or wrench.
Posted by Bill Enos (Member # 440) on 03-05-2001, 05:17 PM:
Don't even consider replacing spline screws with hex socket screws. I've been doing office machine service for 27 years. IBM used splines exclusively in all their mechanical typewriters and we found that on a really stubborn screw you can wind a spline wrench at least three turns before the wrench breaks and the screw head will rarely strip out. Try that on a hex screw. Surging the wind up really works well in breaking over tightened screws loose.
Posted by Paul G. Thompson (Member # 655) on 03-05-2001, 07:43 PM:
Yes, Bill. Now the people know why I like Bristol screws instead of the hex heads. 