I’ve been working on remotoring/regearing a Mantua HO 0-6-0 loco with a NWSL gearbox and a can motor. I have finally found a motor with a sufficiently long output shaft for the gearbox but it is a 1624 Sagami.
My question is, is this sufficiently large for this loco (weighing 11 ozs.) plus maybe up to three freight cars, weighing around 4-5 ozs. per car? I have a 1630 motor but the shaft is too short. NWSL nor any of the other online sources I can find do not have the 1630 motor in stock.
I remotored a Mantua Pacific some years ago with great success. I used a can motor conversion kit from Mantua (they were still in business back then). The stock open frame motor gave a slowest speed of 5 scale mph. The can motor dropped that down to 0.05 scale mph and reduced the current draw from nearly one amp to a tenth of an amp. The conversion was a screw driver job, no milling, drilling, or filing. The drive is still the simple worm gear on motor shaft driving spur gear on driver axle with gear lash adjusted by shimming the motor. No true gearbox.
I am not familiar with the Sagami motors. However any motor with enough torque to spin the drivers has enough umph to do the job. If the motor remains cool to the touch in normal use you are fine. If I can lay the back of a finger on the motor for the count of ten, it’s plenty cool enough.
Have you considered a drive shaft extension to use the short shafted motor? You buy a pair of NWSL u joints and make up a short drive shaft from tubing. Fit one u joint to the gear box, the other to the motor, and cut the tubing to just the right length.
4 to 5 ounces is a tad heavy for your cars. NMRA recommendation is 1 ounce plus 1/2 ounce per inch of car length. A forty foot car is 5 1/2 inches long, yielding a recommended weight of 3 3/4 ounces. The 0-6-0 ought to handle up to a dozen cars on level track, no sweat.
The Mantuas are good engines. Good mechanism, plenty of weight and with a bit of detailing and good paint they look as good as anything you can buy. Well worth a bit of kit bashing.
Hi there,
I also have an 0-6-0 which I remotored with a motor recycled from a CDROM drive. It works well and pulls 10 cars or so with ease around my admittedly fairly flat layout. If you would like a picture of how it was done, email me off list! My only problem has been weighting and balancing.
Regards from Down Under
Trevor
SG:
I looked at the NWSL brochure here:
http://www.nwsl.com/Brochure%20Pages/BrochureMotors.htm
and it appears that your motor is a 16mm round x 30mm can, roughly
comparable to one of their 167xx motors. This has a stall torque of 55 oz-in, which is just slightly less than the 61 oz-in provided by an original Mantua motor, indicated by Bud’s tests:
http://www.geocities.com/budb3/arts/motor/stltrq.html
You are also changing the gearing, however, so this might make up for lost torque. The new motor will probably be somewhat slower. NWSL says they’re 13000 RPM no-load, versus the PM-1 which tested at 18000.
Summary, disregarding friction and efficiency:
Old engine, PM-1, 26:1 worm drive-
T = 15.9 in-oz torque at axle
V = 104 SMPH top speed
Modified, Sagami motor, 36:1 gearbox-
T = 19.8 in-oz torque at axle
V = 55 SMPH top speed
NOTE NOTE NOTE! You will get a lower top speed in either case, in actual track testing, because the motor simply isn’t running free when it’s in the chassis. There is significant friction. This is often neglected today, and I feel it is a major reason so many commercial models of locos that should be able to go 100 MPH can’t do it - they’re probably designed for what they should do, not tested and reworked until they’ll do it.
You will certainly not get th
I’m pretty sure the can motor Mantua used in the retrofit kits (and factory installed in new engines after 1989 or thereabouts) were Sagami can motors.
Fear the Reg!
David B
I bought Mantua MC-94 upgrade motors back in the 1990s for a couple General locomotives and Model Power is selling the 2-6-6-2 with MC-94 motors. I suspect a different style motor as it now comes with a flywheel. Maybe double shaft.
MC-94 older motor.
CD drive can motor with Roundhouse open frame with skewed armature and flywheel as used in the new DCC Roundhouse 4-4-0, 2-6-0, 2-8-0.
The CD motor is the same size as my MC-94 motor. 26.5mm X 12mm X 16mm , shaft 1.5mm X 9mm
I have regeared with MDC regear kits. It results in a 45 to 1 reduction and uses a Sagami 1620 motor. I used a regear kit, 70 to 1 in a switcher.
Rich
rg98:
Interesting…the very late MDC kits came with that flywheel motor, too. My 2-6-0 kit did, which I bought in 2002. It also had plated drivers…very nice kit for $65 or so!
The MC-94 comes with a flat-sided motor, as shown, which is made by Mabuchi. The round motor is an MC-90, produced by Sagami, and used in locos with “Power Drive”.
I forgot to mention earlier that Yardbird Trains has Mantua remotoring kits, too.