Description
For Sale: All Nation NW2 Switcher Helix Gearing Tower Drive Transmission 40″ Wheels Assembled PN#373AN
Please specify in your order if you want a specific upper drive shaft connector.
ALL-NATION POWER DRIVE Constant Torque Transmission for the NW2 Switcher Engine accommodates the correct wheel base length in the truck side frames. Originally manufactured in our plant in the 1960s, we here at All-Nation feel proud to be able to maintain our modern advanced engineering principles to the gauge for the discriminating craftsman, scale “O” gauge. At a time when quality materials are being withdrawn from small mass-produced model railroad equipment and inferior materials are being substituted for quality long-life more expensive metals, we feel it is significant to note that All-Nation carries on to continually improve it’s “recognized quality” equipment in the craftsman gauge. The principles applied to the Constant Torque Transmission have long been used and proven in automobiles, trucks and industrial equipment of all types, in fact, wherever smooth performance and long-life durability are required.
All components as spelled out in the parts list are new. While the design has been proven, our improvements since its original introduction include the ability to disassemble and assemble the mechanism for any repairs, shim ring fine tuning or maintenance over its life time. Power from the motor is transmitted to the ball joint on the upper shaft of the gear gear box which takes up any end play. All new Steel to brass helical cut gears give constant torque, cat-like quietness and eel-like smoothness unobtainable in straight tooth gear arrangements. The slow speed shaft has a long spline to accommodate traction wheel bases from 1 5/8″ to 2 5/8″ for scale road diesels. It drives the wheels through a steel worm and brass gear on each axle. This 4 wheel drive and automatic equalization insures maximum traction as all 4 wheels are constantly applying pressure to the rails at one time. While this item is specific for the diesel switcher, the wheel base as far as minimum at 1 5/8″ (6’6″ scale) to 2 5/8″ (9’9 1/2″ scale) depends on the length of the drive shaft (aka male spline) from the small gear box that takes power from the tower gear box. Consequently, this transmission configuration can be used on a road diesel with a wider wheel base if the male spline is slightly longer or on trolley models with short wheel base dimensions.
PARTS LIST: PN#4062 Constant Torque Transmission Blueprint Section B (aka small gear box)
1 #4047 drive shaft with 1 #4051 worm gear mounted on the shaft.
2 #4039 gear box sides
4 3-48 x 5/32″ Filister Head #C1301 screws with (lock washers #C2034 or C2031) (may substitute Pan Head type)
2 #4040 spacer bushings
1 #4048 shaft pin for spline connection
1 #4052 brass worm gears mounted on the axle
1 #1524 standard axle
2 #4073 brass axle bushings
2 40″ wheels PN#2146 and PN#2147 (note may be substituted for 33″ or 36″ wheels)
2 Thrust Washers aka Shim Rings
2 Thrust axle thrust washers (maybe Polycarbonate or fiber washers)
2 Bottom Spur Gear Pan 3D Print PN#253AN
4 Gear Pan Retainers
8 0-90 Hex machine screws for the Gear Pan and Retainers
PARTS LIST: PN#4056 Constant Torque Transmission Blueprint Section A
1 Drive Shaft PN#4045 1-1/4″ Long plus pin
4 Spacer Bushings For Drive Shafts PN#4040
1 Spur Gear i.e. Worm Gear for Axle PN#4052
2 Brass Axle Bushings PN#4073
1 Standard Axle PN#1524 (Please specify if using ball bearings in the journal box as diameter is smaller)
8 3-48 x 5/32″ Filister Head #C1301 (may substitute Pan Head type)
8 Lock Washers #C2034 or C2031
4 Thrust Washers aka Shim Rings for drive shaft tuning
2 Thrust Washer for axles maybe (Polycarbonate or fiber washers)
2 40″ wheels PN#2146 and PN#2147 (note may be substituted for 33″ or 36″ wheels)
3 Wheel Insulators (1 is a spare)
1 Worm #4051 (Worm may already be pressed onto shaft PN#4045)
2 Gear housing Side Panels PN#4038
1 Bottom Spur Gear Pan 3D Print PN#253AN
1 Upper Drive Shaft with ball #4042 (options available for universal connectors)
1 Lower Drive Shaft Spline #4041
1 Steel Helix Gear, Upper Drive Shaft #4049 to be mounted on #4042
1 Brass Helix Gear, Lower Drive Shaft #4050 to be mounted on #4041 spline
1 Upper Drive Shaft C Clip #C2036
