IMC offers a variety of Overload Protection Devices including:

Torq/Gard® Clutches

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Output Overload Clutches
IMC Output Overload and Rite-Torq^® Clutches are designed to protect your indexing equipment from costly downtime due to overload or jam conditions by quickly disengaging the drive system.

IMC's patented Output Overload Clutches are recognized as the industry standard for indexer protection, preventing equipment damage and downtime when an overload occurs. The compact units mount directly to any IMC indexer output to suit your application requirements.

IMC Output Clutches include:

Type "D" Flange-Mounted Body	“D” Type clutches are designed to mount on IMC Index Drives with large dial mounting surfaces. The dial plate rests directly on the index drive output flange, providing stability and accuracy.
Type "D-SA" Super-Accurate Flange-Mounted Body	Super Accurate “D-SA” clutches are designed to mount on IMC Index Drives which feature large dial mounting surfaces. Using externally mounted torque nuts, these clutches are easily adjustable throughout their entire torque range. “D-SA” clutches will re-engage to within ±10 arc seconds of their original setting and may be used in wash down applications, making them ideal for use in the most demanding high-performance applications.
Type "F" Flange-to-Flange Mounting	“F” type clutches are designed to mount on IMC index drives. These clutches will flange mount to the output shaft, providing a rigid, compact, and accurate connection with the driven member. “F” type clutches may be mounted in two positions, “A” or “B.” Mounting “B” provides greater rigidity and overhung loading and should be used whenever high loads are exerted on driven members.	Mounting "A"
		Mounting "B"
Type "S" Shaft-to-Flange Mounting	"S" type clutches are designed to mount on IMC index drives without output flanges. The combination of key and clamped hub design provides a rigid and backlash-free connection. “S” type clutches may be mounted two positions, “A” or “B.” Mounting “B” provides greater rigidity and overhung loading and should be used whenever high loads are exerted on driven members.	Mounting "A"
		Mounting "B"
Type "FC" Flange-to-Shaft Mounting	"FC" type clutches are designed to mount on IMC index drives. These clutches will flange mount to the output shaft, providing a rigid, compact and accurate connection.
Type "C" Shaft-to-Shaft Mounting	"C" type clutches are designed to mount on IMC index drives without output flanges. These clutches are used whenever a positive connection is required between two shafts.

Type "S-SD" Shaft to Flange, Shrink-Disk Mounting	“S-SD” type clutches are designed to mount on IMC index drives without output flanges. The shrink disk design converts clamp loads from multiple high strength locking screws to radial gripping force through the use of circular wedges, providing the highest capacity mechanical interference connection available. ‘S-SD’ type clutches may be mounted in two positions, “A” or “B.” Mounting “B” provides greater rigidity and overhung loading and should be used whenever high loads are exerted on driven members. (See S-type clutch, above, for illustrations of Mounting "A" and Mounting "B")
Type "FC-SD" Flange to Shaft, Shrink-Disk Mounting	“FC-SD” type clutches are designed to mount on IMC index drives with output flanges. The shrink disk design converts clamp loads from multiple high strength locking screws to radial gripping force through the use of circular wedges, providing the highest capacity mechanical interference connection available.
Type "C-SD" Shaft to Shaft, Shrink-Disk Mounting	"C-SD" type clutches are designed to mount on IMC index drives without output flanges. The shrink disk design converts clamp loads from multiple high strength locking screws to radial gripping force through the use of circular wedges, providing the highest capacity mechanical interference connection available.

The Rite-Torq® Torque limiting clutches are designed to protect your machinery from costly downtime due to overload or jam conditions by instantly disengaging the drive system.

• Four Sizes & Four Configurations (See Table Below)
• Single position roller detents with hardened steel mating detent plates Reduces fretting corrosion problems associated with ball and other detent styles. Insures positive engagement at optimum torque settings for long, consistent and trouble-free operation. Automatically retains registration of driven and driving shafts.
• Locking set screw on outside diameter of the adjusting nut. Adjust torque setting by loosening set screw and turning the adjusting nut Easy access for torque adjustment after installation on the outside diameter using an Allen wrench and a standard spanner wrench. No special tools required.
• Zero Backlash Rigid design assures no decrease in system accuracy.
• Heavy Duty Die Springs Precise disengagement and automatic, single position re-engagement. Allows wide range adjustment with long life.
• Split Hub or Flange on each end Quick installation.
• Clutch can be driven from either end Mounting flexibility of input and output.

Rite-Torq® Type S/S Shaft to Shaft Mounting	"S/S" type clutches are designed to mount on IMC index drives without output flanges. The combination of key and clamped hub design provides a rigid and backlash-free connection.
Rite-Torq®"F/F" Flange to Flange Mounting	"F/F" type clutches are designed to mount on IMC index drives. These clutches will flange mount to the output shaft, providing a rigid, compact, and accurate connection with the driven member.
Rite-Torq®"F/S" Flange to Shaft Mounting	"F/S" type clutches are designed to mount on IMC index drives. These clutches will flange mount to the output shaft, providing a rigid, compact and accurate connection.
Rite-Torq®"S/F" Shaft to Flange Mounting	"S/F" type clutches are designed to mount on IMC index drives. These clutches will shaft mount to the indexer output, providing a rigid, compact and accurate connection.

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The trip torque setting of the Input Overload Clutches is set under fully loaded, field conditions. When an overload condition is removed, the clutch automatically takes hold and carries peak load as usual. Resetting is required only when the load changes. Since the clutch mounts to the gear reducer, the IOC is selected based on the size of the gear reducer used in the application. Your IMC sales representative will help determine the proper clutch and clutch bore size.

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Torq/Gard^® features include:

Torq/Gard^® Sizing and Selection
Torq/Gard^® overload clutches are available in seven sizes with capacities trip torques from 13 in-lbs to 8000 in-lbs.

Torq/Gard Clutches may be sized using the Speed-Horsepower Chart, the Speed-Torque Chart and these formulas:

Speed/Torque Chart

Model	Trip Torque Maximum (in-lbs)		HP Max	RPM Max	Weight (lbs)	Inertia (lb-in2)	Maximum Bore Dia. (in)
	Min	Max
TG3	13.3	32.7	1.5	1800	1.32	1.45	0.500
TG6	23	56.6	2.5	1800	1.32	1.45	0.500
TG20	56.6	204	4	1500	2.42	5.72	0.787
TG60	200	600	8.5	900	5.5	10	1 1/4
TG200	600	2000	21.5	680	12	46	1 15/16
TG400	2000	4000	22.2	350	38	455	2 7/16
TG800	4000	8000	44.4	350	38	455	2 7/16

Speed/Horsepower Charts

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