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Please note that motors are not returnable! All motors are factory new (but in some cases old), have been stored so they do not touch another motor or a metal surface, and are un-unused. I verify that they work properly (run smoothly, have what my experience tells me is appropriate power for that motor), and pack them carefully for shipping. They are shipped with delivery confirmation, and no refunds are given if the motor is not received (take the issue up with the shipper you told me to use).
If the second shaft makes the motor too long, it is possible to cut the shaft off. PROTECT THE BEARING AND PUT TAPE OVER ALL OPENINGS IN THE MOTOR HOUSING BEFORE CUTTING! THEN ENCLOSE THE ENTIRE MOTOR EXCEPT THE SHAFT TO BE CUT OFF IN A PLASTIC BAG TO PREVENT THE METAL SHAVINGS FROM ATTACHING THEMSELVES TO THE MOTOR HOUSING AND GETTING INTO THE HOLES AT THE OTHER END THAT YOU MAY NOT HAVE SEALED! The Pittman 6313 and Canon FN30 have hardened shafts, so the only way to cut them is with an abrasive cut-off wheel in a Dremel or similar tool. The Pittman shafts can be cut off simply by anchoring the motor, running it at 12 volts, and placing a razor saw on the shaft.
Because of the wide variety of uses for these motors, I have not compiled all the specification data into a matrix that allows easy comparison among all the motors. E.g., in general you will be limited by what will fit, resulting in at most 3 motors to select from.
Source of the below data: Pittman spec. sheet dated 2001.
Length: 1.654"
Diameter (measured): .858"
Width (measured): .770"
Shaft length (brush end, measured): .475"
Shaft length (other end, measured): .395"
Shaft Diameter (measured): .096"
Features: neodymium magnets (more power for the size)
No load RPM: 7780
Stall Current (amps): 10.3
Stall Torque (oz-in): 2.8
Precautionary Notes: if the solder tabs for the brushes need to be bent, don't just
bend them against the motor casing. In other Pittman motors the tab is connected
directly to the brush, and bending the tabs can change the brush orientation causing
the motor to fail; these motors may have the same or similar design.
If a tab must be bent, grasp it next to the casing with some
narrow/needle nose pliers and use them to support the tab relative to the case while
you bend it.
DCC Decoder(s) that I have used successfully with this motor: Soundtraxx Tsunami 1 amp.
My recommendation is that this motor not be used with a Tsunami in any O scale loco with a trailing
truck or more than 4 driver axles.
Price: $40 each plus $7 S&H.
Source of the below data: Pittman spec. sheet dated 1993.
Length (front of sleeve on shaft to end of shaft protrusion at the back, actual measurement): 48MM (1.87")
Diameter: 23MM (.9")
Shaft length (not including sleeve at the housing): 10MM (.39")
Shaft Diameter: 2MM (.078")
Features: ball bearings, neodymium magnets (more power for the size)
No load RPM: 8100 (recommended maximum is 7000)
Stall Torque (mNm): 80, oz-in (calculated from the recommended maximum): 2.7
Stall Current (recommended maximum (thermal limit), amps): 1.4
DCC Decoder(s) that I have used successfully with this motor: In general the
Soundtraxx Tsunami 1 amp. decoder will work OK with this motor. However,
I used this motor with the Tsunami in a Lobaugh 2-8-2 but could not tune the load compensation
so that the loco would pull a train up a 2.5% grade (performance on the flat was OK).
So my recommendation is that this motor not be used with a Tsunami in any O scale loco with a trailing
truck or more than 4 driver axles.
Price each: $40 + $7 S&H.
Source of the below data: Canon spec. sheet dated 2003.
Length of housing (measurement of the actual motor) including end bearing bosses: 40MM (1.56")
Diameter (measurement of the actual motor): 30MM (1.17")
Brush end shaft length (measurement of the actual motor): 15MM (.56")
Other end shaft length (measurement of the actual motor): 11MM (.43")
Shaft Diameter (measurement of the actual motor): 4MM (.156")
Features: ball bearings.
No load RPM: 6300
Stall Torque (called Rated Torque on the spec. sheet) (mN-m): 7.35, oz-in (calculated): 1.05
Stall Current (called Rated Current on the spec. sheet) (milli-amps): 550
Mounting Holes: 2 3MM x .6MM holes 108 degrees apart on an approximate .5" radius
circle centered on the motor shaft. Holes in the shaft end only.
DCC Decoder(s) that I have used successfully with this motor: Soundtraxx Tsunami 1 amp.
Price: $35 each plus $7 S&H.
Source of the below data: Pittman spec. sheet dated 1993.
Length (front of housing to end of rear shaft protrusion): 2.511"
Diameter: 1.175"
Shaft length: .562"
Shaft Diameter: .156"
Features: neodymium magnets (more power for the size)
No load RPM: 10158
Stall Torque (oz-in): 16.8
Stall Current (amps): 10.3
DCC decoder considerations: I have not powered this motor with a decoder, however my
experience says that the NCE D408SR should
be OK. Minimum current capacity of a decoder with this motor is 2.5 amps, preferably 3+ amps;
Less powerful 8X1X Pittman motors overloaded a 1.5 amp decoder and worked OK with a 3 amp decoder.
Ignore what your panel meter shows, it doesn't show the current spikes.
Price: $40 each plus $7 S&H.
Source of the below data: Pittman spec. sheet dated 1992.
Length (front of housing to end of rear shaft protrusion): 2.329"
Diameter: 1.58"
Shaft length: .562"
Shaft Diameter: .156"
Features: ball bearings, neodymium magnets (more power for the size)
No load RPM: 5993
Stall Torque (oz-in): 31.6
Stall Current (amps): 11.1
DCC decoder considerations: the comments for the 8524 above apply.
Price: $60 each plus $7 S&H.
Source of the below data: Pittman spec. sheet dated 1981.
Length (front of housing to end of rear shaft protrusion): 3.084"
Diameter: 2.045"
Shaft length: .744"
Shaft Diameter: .249"
Features: ball bearings
No load RPM: 4620
Stall Torque (oz-in): 42.5
Stall Current (amps): 15.8
DCC decoder considerations: no recommendation, the NCE D808SR may work just fine.
Price: $75 each plus $10 S&H.
Notes:
1. Torque units conversions courtesy of the ASME conversion page at
http://www.engineersedge.com/torque_conversion.htm
Interested in learning more about 2-rail O scale? Please visit the O Scale Kings web pages.