SMR Series Shaft Mounted Gearbox for Mining Sand Crushing & Transport

SMR Series Shaft Mounted Gearbox

1.  Housing: High-strength Gray Cast Iron Gearboxes
2.  Gears: Helical Involute Gears, Carburizing, Quenching, Grinding
3.  Shafts: High-strength Hardening Alloy Steel
4.  Input Configurations: Keyed Solid Shaft Input
5.  Output Configurations: Keyed Hollow Shaft Output
6.  Oil Seal: Double Lips Skeleton Seal
7.  Spare Parts: Torque arm, Optional Backstop

Application of SMR shaft-mounted gearbox

Conveyors

• Head drum drive for screen feeder
• Main drive on are inclined basalt conveyor
• Ship loading elevator
• The main drive to screw conveyor
• Overland buck conveyor drives
• The main drive for transporting animals floods
• Airport baggage handling conveyors

Mixers & Mills

• Biscuit dough mixer
• The main drive to the animal feed mill
• The main drive for asphalt agitator
• paddle drive on animal feed processing plant

Other Application

• Reversing duty on an industrial washing machine
• Container lifting equipment
• Driven by an air motor on an underwater winch system
• Wind turbine drive-used as speed increasing drive to generate electricity

We have various gearboxes for construction machinery; welcome to inquire from us.

Installation of shaft-mounted gearbox

Before installation, remove all shaft defects and foreign matters on the surface of the driven shaft, and then use air drying cleaner on the bearing shells, thrust rings, and SMR holes. Lubricants, anti-seize agents, and anti-corrosion products shall not be applied to the above-cleaned parts.

• Step 1 – Lightly oil the bushing cap screws and screw them back onto the bushing flange, but do not let them protrude beyond the other side of the bushing flange.
• Step 2 – Slide the thrust ring onto the tapered locking sleeve.
• Step 3 – Screw the tapered lock bushing into the SMR hub until the thrust ring is in close contact with the SMR hub.
• Step 4 – Remove the tapered lock bushing and leave a 1 mm gap with the hub.
• Step 5 – Finger tighten the cap screws, so the thrust ring is against the SMR hub.
  The SMR with the bushing is now ready to connect with the driven shaft.
• Step 6 – With the SMR taper lock flange facing you, locate the opposite side of the SMR bush on the driven shaft. (Recommended shaft tolerance is h7.) Slide the SMR unit as close to the driven shaft support bearing as possible. For minimum engagement, the driven shaft must extend beyond the split in the bush barrel. The ideal situation is for the driven shaft to extend beyond the bush flange face . Refer to the table below for minimum shaft to bush engagement.
• 
• Step 7 – Gradually tighten the capscrews to engage the bush system. Using a torque wrench in the appropriate tightening pattern (star pattern ), tighten each capscrew to the torque values shown in the table below.  Should the driven shaft not extend from the SMR bush, use grease to fill the void to prevent corrosion and fouling.
• 

Pulleys and torque arms for gearbox

The performance of the  SMR gearbox depends on
Correct installation, lubrication, and maintenance. Some critical aspects of belt and torque arm installation are listed below:

1. When installing the pulley on the gearbox input shaft, ensure it is as close to the reducer as possible.  This reduces excessive loads on the input shaft bearings that could cause premature failure.

2. When installing the motor and vee belt drive, ensure the belt pull is at approximately 90° to
the center line between output and input shafts. This permits tensioning of the vee belt drive with the torque arm, which should preferably be in tension. The torque arm should be positioned to the right if the output hub runs anticlockwise.

3. When installing the torque arm, ensure it is mounted on a rigid support, and the torque arm will be at approximately right angles to the center line through the output shaft and the torque arm case bolt. Make sure there is the sufficient thread in the turnbuckle for belt tension adjustment.

Mounting Positions Of SMR Shaft-mounted Gearbox

Note: Below 15rpm output speed, the oil level must be adjusted to reach the highest oil level plug.