Product Description:

The R27SSNA-R1-NS-NV-02 is a brushless servo motor built by Pacific Scientific for the R Servomotors series. This motor belongs to the mid-frame diameter zone of the range and is intended for closed-loop positioning in pick-and-place arms, indexing tables, and general motion axes where rapid acceleration and precise velocity regulation are required. When paired with a compatible digital drive, the unit converts electrical commands into continuous rotary torque, which can simplify mechanical transmissions while maintaining better repeatability than open-loop induction systems. That operating profile suits machines that need repeated starts, stops, and short positioning moves during continuous production.

The rotor core is fitted with rare-earth samarium cobalt magnets, an alloy that sustains magnetic flux over wide temperature swings and allows higher shear stress before demagnetization. Primary position data come from a frameless resolver in the transmitter type configuration with a size 15 form factor, so the drive receives high-resolution sinusoidal feedback without the mass of an enclosed encoder. The frame uses the standard housing style, which supports interchange with other R models that share the same basic mechanical envelope. The motor is supplied with no brake, so dynamic braking or a separate mechanical lock must be provided when the axis has to remain stationary after power is removed.

There is no shaft seal protecting the output journal, so the unit is best suited for clean, low-pressure environments where contaminants are controlled. It also has no secondary feedback channel, so only the resolver leads and power phases exit the stator, which keeps the connection scheme comparatively simple. These omissions help reduce inertia and keep the total length short, which supports applications that cycle at high frequency or need a compact motor package. The layout emphasizes magnetic strength and clear feedback signals over integrated holding or sealing features.