Looking for something more specific?

Warner Electric

Back To Manufacturer List

Warner Electric (Altra) – Clutches, Brakes, Torque Control

Warner Electric_Altra Brand LogoISC Companies and Adams-ISC can supply the Warner Electric products on this page and many others found on warnerelectric.com. For more information or for a product quote, please contact us by phone 763-559-0033, by email custserv@isccompanies.com, or by filling out our online contact form.

Founded in 1927, Warner Electric is a global leader in the development of electromagnetic clutch and brake solutions. Warner utilizes the latest materials and manufacturing technologies to design long life, easy-to-use clutches and brakes that provide improved accuracy and repeatability. Warner Electric, now a brand of Altra Industrial Motion, offers the broadest selection of industrial clutches, brakes, controls, and web tension systems from a single manufacturer.

Product Groups

Basic Design Clutch Products

  • PCC Primary Design Coupling Units: PCC Series clutch couplings employ the same basic components as the PC, except for a splined hub and adapter, which serves as a coupling for inline shaft applications.
  • PC Primary Design: Current is carried through brushes and the collector ring to the rotating magnet. The PC design is less expensive than the SF design.
  • SFC Stationary Field Design: SFC Series clutch couplings employ the same basic components as the SF design except for a splined hub and adapter, which serves as a coupling for in-line shaft applications.
  • SF Stationary Field Design: The SF design eliminates collector rings and brush-holder. Ideal for adverse environmental conditions. Mounting tolerances are generally more critical than the PC design. Flange or bearing mounted styles available.

Clutch Modules: IEC Mount

Clutch Modules: NEMA C-Face Mount

Hydraulic and Pneumatic Clutches

PTO Clutches

  • PC (Primary Clutch) design requires a brushholder to carry current from the power source to the rotating magnet.
  • SF (Stationary Field) clutch design consists of a bearing mounted magnet assembly, or field, a rotor assembly, and an armature assembly.
  • CMS 250 Series Commercial MagStop clutch/brakes are designed for heavy-duty mowers.
  • Commercial MagStop clutch/brakes for heavy-duty mowers for large grounds maintenance requirements.
  • GT300 clutch/brake model features a triple-groove pulley to accommodate multiple v-belts.
  • BBC-II Blade Brake Clutches (BBCs) are engaged by actuating the operator presence lever and pushing the blade engagement handle.
  • Residential MagStop (RMS) clutch/brakes for mower decks and other implements controlled by a dashboard switch.
  • TG2000 incorporates the features of the Commercial MagStop clutch/brakes into a design specifically for tractors.

Shaft Mounted Clutches

Tooth Clutches

Vehicular Clutches

Wrap Spring Clutches, Brakes, and Clutch/Brakes

Basic Design Brake Products

  • E510 Brake consists of a magnet, armature and mounting hub for direct mounting to the driven shaft.
  • E520 Brake consists of a magnet armature and mounting hub for mounting to a driven sheave or sprocket.
  • MB Motor Brake: MB motor brakes are composed of a PB brake mounted on a NEMA C-face adapter and cover assembly.
  • PB Brake: PB Series brakes consist of a magnet, armature and mounting hub in a simple and extremely compact design.
  • PBM Motor Brake: Single friction face brakes, activated by power on, and electrically operated.

Caliper, Centrifugal, Fail-Safe, and Motor Brakes

  • ERS VAR-11 is an electrically released caliper brake which operates in static and/or emergency stops.
  • FC-G-C410 centrifugal brake is composed of two parts: the core, mandatory driving, integral with two fly-weights and return springs, and the drum connected to the clutch assembly or to a fixed brake assembly.
  • Pan-Cake (PK) brakes are pre-assembled on/off dry electromagnetic brakes used for parking, emergency, and service braking.
  • CBTB electomagnetic axle brakes are specifically for use on electric-powered, dual-drive vehicles.
  • Pan-Cake (EOP Captive) brakes are pre-assembled on/off dry electromagnetic brakes used for parking and emergency only.
  • XS Brakes are highly reliable devices designed as statically engaged/disengaged holding brake.
  • AP Brakes electromagnetic, spring-applied brakes for very flat, low profile, limited space applications.
  • ERX Series spring-operated, pre-assembled, electromagnetic brakes for parking and emergency stop.
  • Sensor WES is a contactless monitoring solution for detection of strokes, especially on spring applied brakes with noise damping systems.

Vertical Lifting Brakes

FB, ER, ERS, ERD Series

  • FB Series permanent magnet brakes for frequent cycling applications which regularly engage the brake to stop a moving load.
  • ER Series dynamic engagement brakes must be engaged while the shaft is in motion.
  • ERS Series are spring-set, electrically released brakes designed to provide holding functions as well as dynamic stopping in emergency situations.
  • ERD Series brakes are designed to safely keep the load in position in the event of a power or motor failure, whether intentional or accidental.


WR Series

  • WR-180 brakes are an extremely compact design intended for use in static applications.
  • WR-198 brakes can be used for both static and semi-dynamic applications.
  • WR-213 series is ideally suited for the powered wheelchair and scooter markets.
  • WR218/WR220/WR225 static holding, spring applied, electrical and manual released brakes.
  • WR-Thin WR230/WR240/WR250 pre-assembled on/off dry failsafe electromagnetic brakes, highly reliable, and compact for static engagement.

Pneumatic and Hydraulic Brakes

Shaft Mounted, Tooth, and Trailer Brakes

  • EB Series Electro Brakes mount directly on a motor or through shaft for basic braking functions.
  • E710/720 electrically released, tooth operated brake activated by spring pressure.

Basic Design Clutch/Brake Products

  • PCBC Primary Clutch/Brake Coupling: The PCBC clutch/brake coupling series combines a PCC clutch coupling with a PB brake.
  • SFPBC Stationary Field Clutch/Brake Coupling: The SFPBC clutch/brake coupling series combines a SFC clutch coupling with a PB brake.

Foot Mounted and Shaft Mounted Clutch/Brakes

Electro Pack performance products are offered as clutches, brakes, and clutch/brake combinations, and can be base mounted, shaft mounted, or installed on or between C-face motors and reducers.

Clutch and Brake Controls

Coil Products

Sensors and Switches

Torque Control Products

Looking to place
an order?

ISC Companies and affiliate Adams-ISC are industrial distributors of bearings and mechanical power transmission parts. We have many different models and brands in stock for fast delivery. Our sales professionals are happy to assist you in the selection process to ensure the correct part is specified for your application. Get a quote by clicking below on “Request Pricing” and filling out the contact form or give us a call at 1-800-627-9434.

Request Pricing