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Author
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Topic: Spindle Sizes
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Stephen Furley
Film God
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 08-31-2015 07:24 AM
Steve, spindle sizes have never been standardised for 35 mm, there are many different types.
The ones on your rewinder, with the drive key, are 5/16", and are most common on equipment of American origin. Spindles of the same size but with a drive pin were used on some early projectors; think hand-cranked days, so you are unlikely to see one outside of a museum.
Traditionally, 3/8" was widely used in the UK, and 9 mm in mainland Europe. These both use a drive pin. They are very similar; I have some old 3/8" Kalee spools which will fit Kinoton 9 mm spindles, though they are slightly loose.
You may find small plastic spools with a 5/16 hole, square on one side, as used for 16 mm. These are not for motion picture film; they are for document microfilm, where the readers are generally made to handle both gauges.
1/2" starts to get complicated; there are several different types. American ones are different to European ones, but I'm not sure exactly how, I think it's something to do with the size and position of the drive pin. some spindles have one drive pin, and others two, spaced 180 degrees apart. some spools have three holes and some four. The three-hole type will obviously not fit a two pin spindle. 1/2" was introduced for larger spools; it is possible to get 5/16" ones up to 6000 feet, but I wouldn't recommend them. 1/2" is widely used on 35/70 mm dual gauge machines, and on long-run towers.
There are, or were, a few projectors which take their own, unique spools. The Fedi Solo, an early machine which could take an entire programme on one large spool, had a fairly conventional looking spindle, but about an inch in diameter, while the BTH SUPA Mk. 1 used 2000 foot spools with a weird, very large splined spindle.
Yes, there are cores with holes in them for those spools, but they're not very common here.
Most rewinders, and many projectors can take interchangeable spindles. This is not a recent thing; the parts list for the Kalee 21, made from 1947 to 1958, lists several different size spindles. Kinotons also take different size spindles, so just asking for 'spools for a Kinoton' may not get you the right size.
If you ever have a print sent over from the USA it will arrive on 5/16" transit spools, either solid ones in which case you will need the 5/16" spindles on your rewinder, or split ones, like the ones you have seen, in which case you could take them apart, and handle the film on a core, as you usually would.
Good luck trying to find some 9 mm Kinoton spools; I've been looking for a few 2000 foot ones, with no luck so far. I thought there'd be loads of them around.
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