16mm
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Bell & Howell TQI projector
A good machine when running, but an awkward machine to repair, as are most Bell & Howell
To replace internal drive belts most of the works have to be removed
Also main shaft worm gear (large white plastic gear) has a habit of splitting after a few years of use,
or becoming very brittle
To replace this gear with the new nylon type I was quoted £25.00 for the gear, and £90.00 for fitting
Like changing a belt the whole works have to be removed
I junked the machine
I do not advise anyone without the special tools and knowledge to try and effect repairs themselves
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