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Sailrite MC-SCR Power System  |  

MC-SCR MotoR InStallatIon

 

Sailrite MC-SCR Power System:

MC-SCR MotoR InStallatIon

The MC-SCR Power System is a compact, powerful 
motor that offers greater slow speed power and control 
than a clutch motor. MC-SCR systems include a motor, 
control box, motor pulley, motor bracket, foot pedal, and 
adjustable length 3L belt. 

1-5/16"

2-5/8"

3-1/8"

Mount the MC-SCR MotoR

The MC-SCR motor can be mounted either to the top 
or bottom of the table with lag screws. First, mark the 
proper position for the motor’s bracket. Use 

Figure 1

 as a 

guide for the positioning of the mounting holes (accurate 
for Sailrite 111 sewing machines). If necessary, install the 
drive belt first to help ensure proper motor position.

Measurements may vary depending on the sewing 
machine and configuration. Check for a proper fit before 
drilling. Using a 5/32" drill bit, drill about 3/8" into the 
table.

Attach the motor to the motor bracket (

Figure 2

).

adjuSt the dRIve Belt

Slide the motor pulley onto the end of the motor and 
tighten the set screw on to the shaft flat (

Figure 4

). Align 

the pulley with the balance wheel belt groove and then 
really tighten the screw down.

MC-SCR Power System (#100809)

Then bolt the motor and bracket to the table  
(

Figure 3

).

Set the table and machine upright and test fit for belt 
length. The MC-SCR Power System comes with a 3L drive 
belt which is adjustable in length (by removing links). 
Insert the belt end through the holes in two layers and 
then twist to lock in place (

Figure 5

). Tuck the loose ends 

over the next V (knob). Flip the belt so the V's face in 
(smooth surface facing out) and the belt is ready to use.

Underside of table

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