Gearhead Operators

PRO-GHC
Industrial Worm Gear Jackshaft Operator with Chain Hoist

It's the Professional's Choice


The Micanan Model PRO-GH Electric Door operator assembly is the size and capacity recommended by door manufacturers. It comes complete with electric and factory-wired motor controls, worm-gear reduction unit, solenoid operated brake, conduit and wiring from control to motor, and accessories required for proper operation.

Door preparation, miscellaneous or structural metal work, field electrical wiring, conduit, fuses and disconnect switches are in the scope of work of other divisions or trades.

The Motor Starter is an across-the-line, mechanically interlocked, magnetic reversing contractor. The motor starting device is enclosed in a NEMA 1 enclosure and integral with the operator. Control enclosures conform to ANSI/NEMA ICS6. A NEMA Type 1 OPEN/CLOSE/STOP control station is provided as standard equipment.

Frame and Reduction: Speed reduction is a worm-gear-in-oil-bath gear reducer. It provides a 45:1 speed reduction. The door drive utilizes #50 roller chain and sprockets. The operator is capable of driving the door at a speed of approximately 6 to 10 inches/sec.

Emergency Operation: The Model PRO-GH is equipped with an electrically interlocked floor level disconnect and universal chain hoist for manual operation. There is an Electric Solenoid Actuated Brake to stop the motor and hold the door in position.

The Limit Switches are fully adjustable, driven linear-type limit switch mechanisms that synchronize the operator with the door. Low friction limit nuts fitted on threaded steel shaft, rotating on iolite self-lubricating bronze bushings.

The Model PRO-GH is easy to install. Just install the motor in accordance with the Micanan Systems instructions and standards. Installation is in compliance with applicable federal, state and local regulations.

The Micanan System warrants its PRO-GH Electric Door Operator Assembly to be free of any defect in materials and workmanship for a period of two years. Approximate shipping weight is 110 lbs.

Other Features Include:

  • Three Button Control Station
  • Chain Keeper
  • 24V Fused Control Circuit
  • Fully Adjustable Rotary Limit Switches
  • Baked-on Dark Grey Coat Finish
  • Powder Metal Limit Cams
  • Full Feature Logic Control Board (Optional)
  • Full Overload Protection
  • External Radio Control Terminal Strip
  • Motor Removable Without Affecting Limit Setting
  • Universal Left or Right Hand Mounting

Parts Diagram

Parts List

  Model ref no Part no Description Qty
  PRO-GHC 2 B MC00002 GEAR REDUCER CH70 (2, 3HP) 1
  PRO-GHC 2 A MC00018 GEAR REDUCER BHC 63 (1/2,3/4,1,1.5 AND 2HP) 1
  PRO-GHC 3 MM00004 FRAME GEARHEAD MSI0030 1
  PRO-GHC 4 MM00015 SOLENOID LEVER GEARHEAD MSI0031 1
  PRO-GHC 5 MM00017 PIVOT BRACKET GEARHEAD MSI0033 1
  PRO-GHC 6 A MK00026 SOLENOID 120V 1 *
  PRO-GHC 6 B MK00027 SOLENOID 220V 1 *
  PRO-GHC 6 C MK00028 SOLENOID 460V 1 *
  PRO-GHC 6 D MK00029 SOLENOID 575V 1 *
  PRO-GHC 7 MM00012 SOL-COVER GEARHEAD MSI0032 1
  PRO-GHC 8 MM00020 DISCONNECT ARM GEARHEAD MSI0035 1
  PRO-GHC 9 MM00022 SUPPORT U-BR H/HHD/GEARHEAD MSI0015 1
  PRO-GHC 10 MM00007 GEARHEAD FRAME SUPPORT C-BRACKETS MSI0036 3
  PRO-GHC 11 MM00005 BACK COVER MSI0037 1
  PRO-GHC 12 MM00013 CHAIN GUARD MSI0014 1
  PRO-GHC 13 MM00002 CONTROL BOX MSI0001 1
  PRO-GHC 14 MM00001 CONTROL BOX COVER MSI0005 1
  PRO-GHC 15 MM00046 CONTROL BOX HINGE 2
  PRO-GHC 16 MM00024 CAM PLATE MSI0013 1
  PRO-GHC 17 ME00001 LIMIT SHAFT 3/8-1/2 x 9.75" 1
  PRO-GHC 18 MM00026 CUT-OUT SW. ACTIVATION PLATE GH MSI0042 1
  PRO-GHC 19A MM00027 REAR BRACKET GH (RED 55,63,70,80) MSI0038 1*
  PRO-GHC 19B MM00028 REAR BRACKET GHC (RED 80 - 182TC) FOR 3, 5HP (MSI0039) 1*
  PRO-GHC 20 ME00008 DISCONNECT SHAFT GEARHEAD 3/4" x 15.75" 1
  PRO-GHC 21 MH00001 BRONZE T-BUSHING 3/8" ID 2
  PRO-GHC 22 MH00002 MILD STEEL BUSHING 9/32ID x 13/32OD x1-1/16 1
  PRO-GHC 23 MH00003 OILITE FLANGE BUSHING 3/4 ID X 7/8" OD 2
  PRO-GHC 24 MD00001 BEVEL GEAR 20 TOOTH 3/4 ID C/W KW 2SS 1
  PRO-GHC 25 MD00002 BEVEL GEAR 20 TOOTH 5/8 ID C/W KW 2SS 1
  PRO-GHC 26 MJ00001 BRAKE SHOE LEFT 1
  PRO-GHC 27 MJ00002 BRAKE SHOE RIGHT 1
  PRO-GHC 28 MJ00003 BRAKE DRUM 1
  PRO-GHC 29 MI00003 POCKET WHEEL c/w 2 pins & bushing 3/4 ID 1
  PRO-GHC 30 MG00030 LIMIT CAM 1/2-20 UNF 2
  PRO-GHC 31 MH00013 FLANGE BEARING 3/4" IDx1-3/8 OD 1
  PRO-GHC 32 MD00005 SPROCKET 410B12 X 3/8" 1
  PRO-GHC 33 MD00050 procket 410B23 x 1" bore 1
  PRO-GHC 34 MH00006 COLLAR 3/8 ID 1
  PRO-GHC 35 MH00008 COLLAR 3/4" ID 4
  PRO-GHC 36 MG00003 DOUBLE NUT FOR LIM-SW. 2
  PRO-GHC 37 MJ00006 LIMIT SWITCH SPACER 3/4" LONG 8
  PRO-GHC 38 B MD00011 #410 roller chain 2FT. LONG c/w connecting link (for reducer BHC 80) 1 *
  PRO-GHC 38 A MD00226 #410 roller chain 69 links c/w connecting link (for reducer CH 70) 1 *
  PRO-GHC 39 MO00001 CAM PLATE COMPRESSION SPRING (.178IDx.032GX.55L) 2
  PRO-GHC 40 MO00002 BRAKE COMPRESSION SPRING (5/16"ID-.05G-2.50L) 1
  PRO-GHC 41 MO00014 GEARHEAD DISCONNECT SPRING (0.92ID x 0.09G x 2.00"L) 1
  PRO-GHC 42 MQ00001 COTTER PIN 1/8 x 1.5 1
  PRO-GHC 43 MQ00018 COTTER PIN 3/16 x 2" LONG 1
  PRO-GHC 44 MQ00005 SPRING PIN 3/16" x 1-1/2" Long 1
  PRO-GHC 46 MQ00007 SPRING PIN 1/4" x 2" Long 2
  PRO-GHC 47 MQ00008 SET SCREW 5/16" -18 12
  PRO-GHC 48 MQ00010 SET SCREW 10 -24 1
  PRO-GHC 49 MG00005 H.H. slotted self rounding washer head screw 8-32 UNFx3/8 18
  PRO-GHC 50 MF00003 R.H. PHILLIPS MACHINE SCREW 4-40 UNCx1-1/2 8
  PRO-GHC 51 MF00004 R.H. PHILLIPS MACHINE SCREW 6-32 UNC x1 2
  PRO-GHC 52 MF00005 R.H. PHILLIPS MACHINE SCREW 10-32 UNF x 5/8" 2
  PRO-GHC 53 MF00006 HEX HEAD BOLT 1/4-20UNCx1/2 (Full thread) 4
  PRO-GHC 54 MF00008 HEX HEAD BOLT 1/4-20UNCx1 (Full thread) 1
  PRO-GHC 55 MF00048 ROUND HEAD SLOTTED BOLT 1/4-20UNCx1-1/4" (Full thread) 2
  PRO-GHC 56 MF00076 HEX HEAD BOLT 1/4-20UNCx2" (full thread) 1
  PRO-GHC 57 MF00009 HEX HEAD BOLT 1/4-20UNCx2-1/4" (Not full thread) 2
  PRO-GHC 58 MF00044 HEX HEAD BOLT 1/4-20UNCx4" (Not full thread) 1
  PRO-GHC 59 MF00007 HEX HEAD BOLT 1/4" - 20UNC X 3/4" (Full thread) 4
  PRO-GHC 60 MF00019 HEX HEAD BOLT 3/8-16UNCx1 (Full thread) 4
  PRO-GHC 61 MG00006 HEX NUT 1/4-20UNC 3
  PRO-GHC 62 MG00007 HEX NYLON LOCK NUT 6-32UNC 2
  PRO-GHC 63 MG00008 HEX NYLON LOCK NUT 10-32 UNF 2
  PRO-GHC 64 MG00009 HEX NYLON LOCK NUT 1/4-20UNC 3
  PRO-GHC 65 MG00011 RIBBED HEX NUT 1/4-20UNC 12
  PRO-GHC 66 MU00001 SWIVEL PULLEY PS-05 1
  PRO-GHC 67 MR00001 DISCONNECT CABLE 3/32 X 12" LONG 1
  PRO-GHC 68 MQ00011 3/32" ALUMINUM OVAL SLEEVE 1
  PRO-GHC 69 MR00008 DISCONNECT SASH CHAIN 1
  PRO-GHC 70 MG00016 10 FLAT WASHER 2
  PRO-GHC 71 MG00017 1/4" FLAT WASHER 6
  PRO-GHC 72 MG00018 LOCK WASHER 3/8" 10
  PRO-GHC 73 MG00019 FLAT WASHER 13/16" I.D.x1.5OD (3/4" SHAFT SIZE) 1
  PRO-GHC 74 MG00041 SPRING CLIPS 7/8" ID 2
  PRO-GHC 75 MK00004 LIMIT SWITCH (STANDARD) 4
  PRO-GHC 76 MK00005 CUTOUT SWITCH C/W NUT & WASHER 1
  PRO-GHC 77 ME00018 KEYWAY 3/16 SQ. x 1-1/4" LONG 1
  PRO-GHC 78 MG00010 RIBBED HEX NUT 10-32 UNF 2
  PRO-GHC 79B MH00004 Flange Bearing UCFL 207 22 1-3/8" Bore (BHC 80) FOR 2, 3, 5HP 2*
  PRO-GHC 79A MH00005 Flange Bearing UCFL 207 22 1-1/4" Bore (BHC 63) FOR 1/2, 3/4, 1, 1.5HP 2*
  PRO-GHC 80 MM00008 Frame GHC MSI0034 1
  PRO-GHC 81A MM00029 Front Bracket (BHC 63) FOR 1/2, 3/4, 1, 1.5 HP MSI0040 1*
  PRO-GHC 81B MM00030 Front Bracket (BHC 80) FOR 2, 3, 5 HP MSI0041 1*
  PRO-GHC 82 MF00011 H.H. BOLT 3/8"-16UNC X 3/4" LONG 4
  PRO-GHC 83 MF00002 Hex Head Bolt 1/2" - 13UNC X 1-1/4" 4
  PRO-GHC 84 MG00040 lockwasher 1/2" 4
  PRO-GHC 86 MG00001 RIBBED HEX NOT 1/2" - 13UNC 4
  PRO-GHC 87 MQ00009 SET SCREW 1/4" - 20 2
  PRO-GHC 88 MF00020 Hex Head Bolt 3/8" - 16UNC X 1-1/4" 2
  PRO-GHC 89 MF00046 H.H SLOTTED SELF ROUNDING WASHER HEAD SCREW 10-32 UNF x 1/2" 5
  PRO-GHC 91 MG00047 HEX NLOCK NUT 4-40 UNC 8
  PRO-GHC 120 MR00006 HAND CHAIN 1
  PRO-GHC 121 MU00002 KEYRING 1-1/4" 1
  PRO-GHC 1 MB01008 MOTOR 1/2HP 110V (LIMITED DUTY) 1


© 2007 Warren Door Co.