DORTRONICS SYSTEMS 1107 D Series, Mounting Instructions

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REV#0001A

 
STEP 2)   PREPARE THE ARMATURE 
 

Insert the t wo Roll  Pin  pins into th e 

3/16"' 

diameter  blind ho les. T he pins  act as  g uides th at al low the armat ure  enough 

movement to c onform to the magnet face but prevent it fr om rotating.  T ap the pins gently until they are firmly seated being 

extremely careful not to mar the face of the armature. See Figure 3 below. 

Insert one spring washer on 

5/16-18 

shoulder screw and then insert screw through armature. Add three conical spring washers 

over shoulder and flat stop washer. See Figure 4 below or refer to the diagram enclosed in armature kit. 

STEP 3)   ARMATURE MOUNTING 

THRU BOLT MOUNTING IN HOLLOW METAL DOOR 

Dimensions shown are for standard 1-3/4"thick doors. See 

Parts for Non-standard Applications 

below for hardware options 

and part numbers. 

Drill

11/32 hole

 through door for the sex nut and shoulder bolt assembly. The hole on the exterior side of the door 

only

 must 

be 

enlarged to 1/2

” to accommodate the sex nut. See Figure 3. 

Drill

two 1/4” clearance holes

 for the roll pins. For solid core do ors, the holes should be 1/2” deep

. Important: 

the pins must 

move freely and not bind. Enlarge the holes if needed to ensure that the armature is free to mate squarely with the magnet.    

Insert shoulder screw/armature assembly through face of door, being sure that spring washers remain over shoulder, and hold 

firmly against door b y pushing directly on  head of  screw. Insert sex nut fr om opposite face and assemble. When armature is 

floating freely, tighten 5/16-18-shoulder screw fully and securely. 

MACHINE SCREW MOUNTING

, 

The door mus t be pro perly  reinforced to  1/4” min imum thi ckness  and structured t o ha ndle the  l oad. Dr ill  and tap thru  

reinforcing for 5/16-18 machine screw. Insert shoulder screw/armature assembly, being sure that sprin g washers remain over 

shoulder a nd flat  washer is  b etween s houlder a nd face  of  do or. W hen  armature  is flo ating fre ely, ti ghten 5/1 6-18-shoulder 

screw fully and securely with 5-32 Allen wrench. 

Figure

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Figure

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