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FORMSPRAG

Formsprag is a manufacturer of overrunning clutches, clutch couplings, and backstopping clutches, with a product line that includes sprag clutches, ball bearing supported clutches, sleeve bearing supported clutches, and associated accessories such as stub adapters, torque arms, and OSHA covers. The brand is recognized for its sprag clutch technology, which uses shaped sprags to transmit torque in one direction and freewheel in the opposite direction. Formsprag clutches are used in industrial applications requiring reliable overrunning, indexing, or backstopping functions, such as in conveyor systems, gearboxes, and pump drives. The product range covers bore sizes from 3/4 inch to 1 1/4 inch in the sample set, with static torque ratings up to 675 ft-lb and maximum speeds up to 2,500 RPM. Clutches are available in totally enclosed configurations, with mounting options for shaft extensions. Accessories include FSO stub shaft adapters for use with FSO and HPI clutch series, torque arms for the FS-400 and FS-500 series, and OSHA covers for the FS-600 series. 3G Electric stocks 29 SKUs of Formsprag clutches and accessories, providing datasheets and logistics support for global procurement. The inventory covers clutch series FS-400, FS-500, FS-600, FSR-6, FSR-10, and HPI, enabling engineers and maintenance managers to source replacement parts or new installations without extended lead times. All products are supplied as original Formsprag components, with manufacturer part numbers for traceability. Technical specifications such as bore size, torque capacity, speed rating, and enclosure type are documented to facilitate selection. 3G Electric does not modify or re-brand Formsprag products; it distributes them as manufactured. For procurement specialists, the availability of adapters, covers, and torque arms alongside the clutches simplifies ordering for complete clutch assemblies. The brand's focus on sprag clutch technology means that buyers can expect consistent performance in applications where directional control and torque transmission are critical. Formsprag clutches are designed for industrial environments, with totally enclosed housings that protect internal components from contaminants. The product line does not include brakes or other motion control devices outside of clutch functionality. 3G Electric supports the line by offering a single point of contact for inquiries, quotes, and order processing, with global shipping capabilities.

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About FORMSPRAG

Formsprag is a manufacturer of overrunning clutches, clutch couplings, and backstopping clutches, with a product line that includes sprag clutches, ball bearing supported clutches, sleeve bearing supported clutches, and associated accessories such as stub adapters, torque arms, and OSHA covers. The brand is recognized for its sprag clutch technology, which uses shaped sprags to transmit torque in one direction and freewheel in the opposite direction. Formsprag clutches are used in industrial applications requiring reliable overrunning, indexing, or backstopping functions, such as in conveyor systems, gearboxes, and pump drives. The product range covers bore sizes from 3/4 inch to 1 1/4 inch in the sample set, with static torque ratings up to 675 ft-lb and maximum speeds up to 2,500 RPM. Clutches are available in totally enclosed configurations, with mounting options for shaft extensions. Accessories include FSO stub shaft adapters for use with FSO and HPI clutch series, torque arms for the FS-400 and FS-500 series, and OSHA covers for the FS-600 series. 3G Electric stocks 29 SKUs of Formsprag clutches and accessories, providing datasheets and logistics support for global procurement. The inventory covers clutch series FS-400, FS-500, FS-600, FSR-6, FSR-10, and HPI, enabling engineers and maintenance managers to source replacement parts or new installations without extended lead times. All products are supplied as original Formsprag components, with manufacturer part numbers for traceability. Technical specifications such as bore size, torque capacity, speed rating, and enclosure type are documented to facilitate selection. 3G Electric does not modify or re-brand Formsprag products; it distributes them as manufactured. For procurement specialists, the availability of adapters, covers, and torque arms alongside the clutches simplifies ordering for complete clutch assemblies. The brand's focus on sprag clutch technology means that buyers can expect consistent performance in applications where directional control and torque transmission are critical. Formsprag clutches are designed for industrial environments, with totally enclosed housings that protect internal components from contaminants. The product line does not include brakes or other motion control devices outside of clutch functionality. 3G Electric supports the line by offering a single point of contact for inquiries, quotes, and order processing, with global shipping capabilities.

Common Applications

  • Conveyor backstopping — Formsprag FSO-500 sprag clutch prevents reverse rotation in inclined belt conveyors.
  • Pump drive overrunning — Formsprag FSR-6 sleeve bearing clutch allows freewheeling in dual-pump systems.
  • Gearbox indexing — Formsprag FSO-400 ball bearing clutch provides precise indexing in rotary indexing tables.
  • Fan drive disengagement — Formsprag FSR-10 sprag clutch disengages fan drives during low-load conditions.
  • Machine tool feed control — Formsprag FSO-600 clutch with stub adapter controls feed direction in milling machines.
  • Packaging line timing — Formsprag FSO-500 clutch with torque arm maintains timing in packaging equipment.

Frequently asked questions

Common questions about FORMSPRAG from 3G Electric.

What is the difference between Formsprag FSO and FSR clutch series?

Formsprag FSO clutches are ball bearing supported sprag clutches designed for higher speed applications, with bore sizes typically up to 1 1/4 inch and maximum speeds up to 2,500 RPM. FSR clutches are sleeve bearing supported sprag clutches, suitable for lower speed, higher torque applications, with static torque ratings up to 675 ft-lb. The FSO series uses ball bearings to support the shaft, while the FSR series uses sleeve bearings, which affect the mounting and lubrication requirements. Both are totally enclosed and available in various bore sizes.

Can Formsprag clutch adapters be used with HPI series clutches?

Yes, Formsprag FSO stub shaft adapters, such as MPN AC30157 and AC30158, are specified for use with both FSO and HPI clutches. These adapters mount on the clutch and allow connection to a stub shaft. The AC30157 is for the FS-500 clutch series, and the AC30158 is for the FS-600 series. Ensure the adapter matches the clutch series and bore size to maintain proper alignment and torque transmission.

What is the static torque rating of a Formsprag FSR-6 clutch?

The Formsprag FSR-6 clutch, as represented by MPN CL41346-1GRRH, has a static torque rating of 300 ft-lb. This rating indicates the maximum torque the clutch can hold without slipping when engaged. The FSR-6 has a 3/4 inch bore size and is totally enclosed. For higher torque requirements, the FSR-10 model offers 675 ft-lb static torque.

Are Formsprag OSHA covers required for all clutch installations?

Formsprag OSHA covers, such as MPN AC33596 for the FS-600 series, are designed to meet OSHA safety requirements for guarding rotating equipment. They are not mandatory for all installations but are recommended where personnel access to moving parts is possible. The cover mounts on the clutch and provides a protective barrier. Check local safety regulations to determine if an OSHA cover is required for your specific application.

What is the maximum speed for a Formsprag FSO-500 clutch?

The Formsprag FSO-500 clutch, as seen in MPN CL42154-2GR, has a maximum speed rating of 2,500 RPM. This is the maximum rotational speed at which the clutch can operate reliably. The FSO-500 has a 1 1/4 inch bore size and is ball bearing supported. Operating above this speed may cause overheating or premature wear.

How do I select the correct Formsprag torque arm for my clutch?

Formsprag torque arms are specific to clutch series. For example, the TA400 torque arm is designed for the FS-400 clutch series. The torque arm mounts on the clutch and prevents rotation of the outer race during operation. To select the correct arm, identify your clutch series (e.g., FS-400, FS-500) and match it to the corresponding torque arm part number. 3G Electric can provide cross-reference information if needed.