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Author Topic: Century C to MTR3 with Gilmer (Cog) belt help Dennis Tichy Film Handler Posts: 32 From: Murrysville, PA, USA Registered: Dec 2000 posted 12-29-2002 05:50 PM                     I know one of Film-Tech's experts will nail this question. I have put a Century C onto of an MTR3 soundhead. That means the C is now a direct drive head. To do this you can either run a chain or a Gilmer (Cog) belt. I am using the Gilmer belt. The motor is a non-sync 1725 rpm with a 5/8" shaft. The drive gear on the C has a one " hole. With me so far? Now here comes the question. I put a 2" pully gear on the motor and a 2&1/2" on the C. The machine runs, but too slowly. I know that I must find a bigger pully for the motor and a smaller one for the C------but (and here is the question), what are the correct sizes I need? As I mentioned I know one of our experts will have been through this before, so thanks in advance and Happy New Year.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-29-2002 07:28 PM                     Oh, there is more here than meets the eye. You will need the correct gear set for the main drive gear too. What gears you will need also depends on if you are using the old style ST-744 main drive shaft or the newer style (larger diamter shaft but the pulley adapter is removable. Steve  |  IP: Logged Dennis Tichy Film Handler Posts: 32 From: Murrysville, PA, USA Registered: Dec 2000 posted 12-29-2002 08:06 PM                     Steve, Why don't you give me the correct sizes for both cases. I am fairly certain I am using the updated version with the removable pully gears to which you referred. Thanks for your help. Dennis  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 12-29-2002 09:19 PM                     The gear on that shaft and the one it mates with on the verticle shaft need to be replaced The gear on the verticle shaft is GR-182 And the complete main drive is M5-g-111t and the gear on it is a GR-328  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-30-2002 08:40 AM                     Using the current offerings and to use a "gear belt" You would want a PY-1318 motor pulley, PY-1312 projector pulley and a BE-1474 belt (it is one of the modern metric belts). I believe there may be a need to use the modern shaft with this arrangement...that is the ST-2154 with removable pulley adapter instead of the old ST-744. The M5-G-110T has everything for the main drive shaft except the pulley itself As Gord said, with all direct drives you need the GR-182 steel gear on your vertical shaft. Steve  |  IP: Logged Dennis Tichy Film Handler Posts: 32 From: Murrysville, PA, USA Registered: Dec 2000 posted 12-30-2002 09:43 AM                     Dear Steve and Gordon, Thanks for the help. I have already replaced the gears on the verticle shaft and the drive pinion does have the removable pulley adaptor. I will see if I have a PY-1318 and PY-1312. Would either of you happend to know the diameter of those two gears?  |  IP: Logged Dennis Tichy Film Handler Posts: 32 From: Murrysville, PA, USA Registered: Dec 2000 posted 12-30-2002 11:25 AM                     BINGO! Works like a fine Swiss watch. Thanks to both Gordon and Steve.  |  IP: Logged

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