8mm Forum: Worm Gear Replacement

This is topic Worm Gear Replacement in forum 16mm Forum at 8mm Forum.

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Posted by Brad Kimball (Member # 5) on January 11, 2007, 01:14 AM:

Anybody ever attempt to replace a worm gear on a B&H 2500 series unit?

Posted by David Park (Member # 123) on January 12, 2007, 06:19 AM:

No I have not tried, decided not to for a number of reasons.
First here in UK replacements made of solid plastic cost about £35. ( A B&H machine on UK Ebay will average about £40, the last 26** range will be about twice that.)

I'm told it is a major strip and rebuild of the machine to fit the worm gear, and unless done by a very carefull expert the machine will have out of line fauts when complete. To have the work done will add over £100.

So I scrap the B&H 's with worm gear faults.

I've found the later models with the dark grey/brown cases to be the most reliable. I avoid the green ones I have never had one free of worm problems, previous models 50/50.

Posted by Brad Kimball (Member # 5) on January 13, 2007, 08:25 AM:

I've been toying with just hacking one up myself since I have 2 models that are running, but one has sound issues and the other has a loop-bunching issue. So, what the hell, if I'm going to trash them anyway why not see what my limited knowledge and some good common sense can accomplish, right? Does anyone know if you need special tools or are allen wrenches and a screwdriver sufficient?

Posted by Lee Mannering (Member # 728) on January 17, 2007, 02:32 PM:

A top tip for you.

Video the projector being taken to bits in close up, and when you come to put it back together you can play the tape backwards (slow search). This way you will know how everything goes back together again. It is a doable job but take your time...

Posted by John A. Pommon (Member # 292) on January 19, 2007, 05:04 AM:

quote:
Lee Mannering: A top tip for you.
Video the projector being taken to bits in close up, and when you come to put it back together you can play the tape backwards (slow search). This way you will know how everything goes back together again. It is a doable job but take your time...

What a great idea. [Big Grin]

Posted by Kevin Faulkner (Member # 6) on January 24, 2007, 05:34 PM:

Dont forget there are service manuals on the forum in the manuals sections. Download them as a guide to stripping down and rebuilding with all the correct setup procedures.

Great fun stripping down the B&H's to replace worm gears [Frown]

and watch out for flying springs [Big Grin]

Kev.

Posted by Brad Kimball (Member # 5) on January 24, 2007, 09:08 PM:

Geesh......I totally forgot about the MANUALS section of this site. Thanks, Kevin.

Posted by Josef Grassmann (Member # 378) on May 24, 2007, 11:09 AM:

Dear Mr. Park,
I learned that B+H 16mm full plastc worms costs approx. 35 Pounds.
Im looking for worms.
Could you please give me address, Tel.No. of a seller of B+H worms?
Thanks in advance,
Best regards
Josef Grassmann

PS:
everybody else ist invited to give me information about seller of worms for B+H 16mm

Posted by David Park (Member # 123) on May 24, 2007, 11:35 AM:

Ebay item
http://cgi.ebay.co.uk/bell-and-howell-worm-gear_W0QQitemZ140118704400QQihZ004QQcategoryZ11722QQrdZ1QQcmdZViewItem
This seller is a well known dealer, and will probably have more.

Posted by Lars Pettersson (Member # 762) on May 24, 2007, 01:44 PM:

Gentlemen,
Why not avoid B&H entirely? [Big Grin]

Bauer,Eiki,Elmo just seem to run forever... [Roll Eyes]

Cheers,
Lars

Posted by Graham Ritchie (Member # 559) on May 25, 2007, 02:58 AM:

The big plus with B/H over projectors like Eiki is the use of the three claw pull down, which makes them more forgiving with old films. [Smile]

I have seen collectors having more trouble loosing loops etc with there two claw Eiki, [Eek!]

it does surprise me that while they build a good projector Eiki completly fail in this department. [Confused]

The late model B/H slot loader I have been using for about 13 years now has never given any problems. [Wink]

Graham.

Posted by Josef Grassmann (Member # 378) on May 26, 2007, 06:44 AM:

Dear Mr. Pettersson,
I repair filmprojectors and to remain familiar with stripping off B+H´s you need at least 1-2 worm replacments per year.
When B+H´s worm gears had been replaced, then they will stay in very relaiable state for many years.
Last year I replaced 3 Worms. In 2007 I have done nil so far. But I have 3 B+H´s here with broken worms, waiting for repair. One is provided with Marc 300 arc-lamp (my own one).
Nevertheless I like Bauer, Fumeo, Eiki(ELF), Siemens 2000, Elmo a.s.o., too.

Posted by Ian John (Member # 507) on June 01, 2007, 06:49 PM:

Hi Brad,

I beleive Phil Sheard at Classic Home Cinema has them. Read the "About Us" page on his site (right-hand side of page). Here's the link:

http://www.classichomecinema.co.uk/

Hope it's of some help to you.

Regards.
Ian.

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