M.C.B. Type Steel Wheel Assemblies

These M.C.B. type assemblies are the finest heavy duty wheels made. They are equipped throughout with standard self-aligning bearings, which take all thrust, as well as radial loads. The wide bearing spacing, make possible by the outboard style of mounting, is a decided advantage in properly distributing the combined thrust and radial loads encountered in crane operation. The outer race of one bearing on each shaft has a small amount of float to provide for expansion of the shaft. Bearings may be inspected by removing the cover plates.

Wheels
Cast steel, double flanged, with treads finished for the runway rail specified.
Wheel Bearings
Standard heavy duty, self-aligning, spherical roller bearings.
Wheel Bearing Housings
Cast steel with finished mounting faces and removable cover plates
Axles
Finished all over, pressed in finished wheel bore.
Wheel Gear
Steel with standard pitch cut teeth, pressed and keyed on finished wheel hub.
Pinion Gear
Steel with standard pitch cut teeth.
Stub Shaft
Finished all over, extended end has a standard keyway for coupling to a squaring shaft.
Stub Shaft Bearings
Standard self-aligning ball bearings mounted in flange type housings with removable covers plates.
Lubrication
All bearings are provided with grease fittings for pressure lubrication.

We have an engineering staff that can design assemblies which are not listed, Please solicit your inquiries to sales@downscrane.com.

ITEM
NO.		 TREAD
DIA.
(IN)		 TYPE CAPACITY
PER WHEEL
(LBS)		 FOR MAX.
A.S.C.E
RAIL
(# RAIL)		 GEAR
RATIO		 WGT.
(LBS)		 DIMENSIONS
(INCHES)
A B C D E G J M O P R S T U
3891 12 NON-GEARED 20,000 40 206 12 13-1/2 2-7/8 6-3/8 7-1/2 14-9/16
3892 12 GEARED 20,000 40 4.10-1 317 12 13-1/2 2-7/8 6-3/8 7-1/2 14-9/16 11-7/8 4 1-7/16 4-3/4 3/8 8.20 4.95 7/8
3893 15 NON-GEARED 20,000 70 267 15 16-1/2 3 6-7/8 8 15-3/4
3894 15 GEARED 20,000 70 4.00-1 377 15 16-1/2 3 6-7/8 8 15-3/4 12-1/2 4-1/4 1-7/16 4-3/4 3/8 10.00 6.63 7/8
3895 18 NON-GEARED 30,000 70 355 18 19-1/2 3 7 8-1/4 16-1/4
3896 18 GEARED 30,000 70 4.11-1 518 18 19-1/2 3 7 8-1/4 16-1/4 15 6 1-15/16 6 1/2 11.50 7.63 1
3897 21 NON-GEARED 50,000 80 578 21 22-3/4 3-1/2 8 9-1/2 18-1/2
3898 21 GEARED 50,000 80 4.32-1 845 21 22-3/4 3-1/2 8 9-1/2 18-1/2 16 6 2-7/16 7 5/8 14.17 9.67 1-1/8
3899 24 NON-GEARED 70,000 100 825 24 25-3/4 3-5/8 8-7/8 10 20-1/2
3900 24 GEARED 70,000 100 4.11-1 1197 24 25-3/4 3-5/8 8-7/8 10 20-1/2 16-7/8 6 2-7/16 7-1/2 5/8 15.33 9.83 1-1/4
Dimensions given are in round numbers. We reserve the right to make changes to our designs at any time that may not be reflected in the table. Please ask for a Certified Dimension Print for current dimensions.

The sizes and capacities listed above are a reference to the most common sizes of this equipment. If you have a different capacity, irregular size or some other need that must be met by our equipment, we will be happy to design one of these pieces of equipment to meet your special needs while also meeting or exceeding our interpretation of the appropriate ANSI / ASME. standards.

Improper use of lifting equipment may cause serious injury or death.
Only a Qualified Operator, as defined by the ASME B30.20 Standards, shall operate equipment.
Read and understand General Warnings before operating equipment.

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Designers and manufactures of "Below the Hook" material handling equipment.

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