Frameless Brushless Resolvers

Frameless, or “pancake”, resolvers consist of two separate assemblies: rotor and stator. Rotor is normally supplied with a sleeve, which can be designed to fit the customer’s interface. Similarly, stator comes with a highly customizable housing. Since they have no internal bearings, frameless resolvers are typically mounted directly into the customer’s assembly. They can be used for position, commutation and velocity feedback. API Delevan’s frameless resolver lineup ranges from size 10 up to size 55.

API Delevan's brushless frameless resolvers generate speed and position data for aerospace, defense, medical, textile, oil & gas and commercial/industrial applications. Their frameless construction simplifies mounting mechanics because the rotor mounts directly onto the motor shaft and the stator housing mounts directly onto the motor end bell.

• Frame Sizes 10, 15, 21, 31, 55 and Specials

• Multiple Speeds

• Radiation Hardened

• High Temperature

• High Shock

• High Vibration

• Environmental Sealing
Frameless resolver technical specification files provided below are provided by product as 3D STEP files with an additional PDF outline file for each product. Specific files will be sent upon request by filling out a brief request form.





API Delevan, 270 Quaker Road, East Aurora, New York, 14052 • Phone: 716.652.3600 • Fax: 716.652.4814