Fractional HP Clutches/Brakes
20Pages

Screw Terminals Standard On Larger Sizes; Smaller Sizes with Leads, UL Recognized Materials Sealed Ball Bearings Standard On Larger Sizes; Sintered Bronze On Smaller Sizes Coils with UL Recognized Materials Wear Retarding Friction Material For Long Life & Quiet Operation Various Bore Sizes Available As Standard Armature Assembly Zero Backlash Standard Typical Applications of Clutches & Brakes • Copiers/Printers • Packaging Machinery • Microfilm Readers • Medical Equipment • Conveyors • Postal Sorters/Readers • Document Feeders • Textile Equipment Generating the Clutch or Brake Torque Warner...

Selection Process STEP 1 These graphics provide a visual guide to unit mounting in a typical installation. PB The brake will be mounted on a driven shaft with the magnet secured to the machine frame. When engaged, the brake will bring the rotating load to a stop and hold until power is removed. SF/SFP The SF or SFP clutches are designed for parallel shaft mounting and will connect to the load via a chain or belt drive. The clutch can be mounted to either a driving or driven shaft. SFC The SFC clutches are designed for use with two in-line shafts. Half of the clutch will mount to the driving...

STEP 2 Determine the shaft speed at the clutch or brake location. Whenever possible locate the clutch or brake at the highest speed shaft available to perform the desired task. A higher speed will provide a lower torque requirement and therefore a smaller clutch or brake. STEP 3 Use the chart below to find the intersection of the speed and torque for your application. This will provide the unit size. STEP 4 Using the appropriate catalog page confirm unit dimensions and mounting. Provide unit bore size(s) and coil voltage. For additional calculation formulae and dynamic torque curves, please...

1. Extended armature hubs Models 150, 180 and 200 (3) #4-40 tapped holes on a .812 BC 2. Extended armature hub Model 225 (3) #6-32 tapped holes on a 1.187 BC 3. Extended armature hub Model 265 (3) #8-32 tapped holes on a 1.375 BC Mechanical Model Lead wire is UL recognized style 1213, 1015 or 1430, 22 gage. Insulation is .0509 O.D. on 090, 110, 150 units; .0649 or .0959 O.D. on all other units.

* 7/8 and 1 inch bore in rotor only. Mechanical Model Lead wire is UL recognized style 1213, 1015 or 1430, 22 gage. Insulation is .0509 O.D. on 090, 110, 150 units; .0649 or .0959 O.D. on all other units. Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings.

Mechanical Model Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings.

7/8 and 1 inch bore rotor only. Lead wire is UL recognized style 1213, 1015 or 1430, 22 gage. Insulation is .0509 O.D. on 110 units; .0649 or .0959 O.D. on all other units. Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings.

Mechanical Model Lead wire is UL recognized style 1213, 1015 or 1430, 22 gage. Insulation is .050” O.D. on 110 units; .064” or .095” O.D. on all other units. Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings. • Contentricity between the shafts within .005 T.I.R. • Initial airgap setting of .005 - .020 inches.

Dimensions Mechanical Electrical Model Lead wire is UL recognized style 1213, 1015 or 1430, 22 gage. Insulation is .050” O.D. on 090, 110, 150 units; .064” or .095” O.D. on all other units. Customer shall maintain: • Squareness of the brake mounting surface with armature shaft within .005 T.I.R. • Concentricity between the brake mounting pilot diameter and the shaft not to exceed .010 T.I.R. • Initial air gap setting of .005 - .020 inches.

Dimensions EXTENDED HUB NOTES: 1. Extended armature hubs Models 180 and 200 (3) #4-40 tapped holes on a .812 BC 2. Extended armature hub Model 225 (3) #6-32 tapped holes on a 1.187 BC 3. Extended armature hub Model 265 (3) #8-32 tapped holes on a 1.375 BC Mechanical (SFPB & SFPBC) Model Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings. • Initial air gap setting of .008 - .020 inches.

SFPBC Series SFPBC Series Electrical (SFPB & SFPBC) Model Lead wire is UL recognized style 1213, 1015 or 1429, 22 gage. Insulation is .050” O.D. on 110 unit; .064” or .095” O.D. on all other units. Customer shall maintain: • A loose-fitting pin through the anti-rotation tab to prevent preloading the bearings. • Contentricity between the shafts within .005 T.I.R. • Initial air gap setting of .008 - .020 inches.

Determining the Clutch or Brake Size First, determine which style clutch or brake you need. The type of unit selected depends upon the function to be performed. Next, determine the size of the clutch or brake. There are two methods you can use to calculate the dynamic torque required. Warner Electric clutches and brakes are rated by static torque. The clutch or brake size can also be determined using the selection chart. Find the intersection of the prime mover horsepower (HP) and shaft speed at the brake using the selection chart on Page 4. The relationship between the horsepower and speed...

Selection Criteria Response Times for Clutches & Brakes Response Times Notes: 1. Torque decay time is dependent on the type of arc suppression circuit used. Decay times shown in table assume use of a diode in parallel with the coil for arc suppression. If no arc suppression is used, torque will decay almost instantly. 2. Actual response times depend on several factors such as inertia being accelerated or decelerated, speed, load torque, and type of switching used. 3. Time to full torque can be shortened by applying overexcitation voltages up to 50 times the rated coil voltage. 4. The time...

How To Order Building an Ordering Part Number is fast and easy using the Specifications charts on each product page. Simply select the clutch type, clutch size, bore size(s) and voltage you require. Ordering Number Example: SFC200-516-316-12 SFC Unit Type SF SFC SFP PB SFPB SFPBC Input Bore Size Output Bore Size