XTR Rotor Housing Rolling Pin

Accelerate bedding-in. Improve surface consistency.

The XTR Rotor Housing Rolling Pin is a precision rotary engine workshop tool designed to flatten and refine rotor housing surfaces quickly and consistently. It’s ideal for both brand new and used housings, helping achieve a more uniform surface profile prior to final assembly.

On brand new housings, the rolling pin is especially effective at accelerating bedding-in times for race engines by lightly conditioning the surface, allowing seals to seat more quickly and consistently under load.

Key Features & Benefits

Faster bedding-in for race builds – Prepares new housings for improved initial seal contact and reduced run-in time.
Surface refinement – Helps flatten light high spots and minor surface irregularities.
Improves consistency – Creates a more uniform surface prior to measurement, lapping or assembly.
Simple, controlled process – Faster and more repeatable than manual methods.

What It’s For

Conditioning brand new housings for high-performance and race applications.
Cleaning up light surface imperfections on used housings.
Prepping surfaces before final inspection or assembly.

What It’s Not
The XTR Rotor Housing Rolling Pin is not a resurfacing tool and will not repair damaged, warped, or out-of-spec housings. It is not a substitute for professional machining or grinding where material correction is required.

This tool is intended as a surface conditioning and preparation tool, not a repair solution.

Instructions – Diamond Coated Rolling Pin (Rotor Housing Surface Conditioning)

Lubricate the surface
Apply a light, even coat of lubricant to the rotor housing surface you will be working on. Suitable lubricants include WD-40, CRC, or similar light penetrating oils.
Position the rolling pin
Place the diamond coated rolling pin directly onto the rotor housing surface. Hold the tool firmly with both hands, one on each side.
Resurface the housing
Move the rolling pin back and forth along the surface in a controlled, linear motion. The goal is to drag the tool across the surface rather than allowing it to freely roll.
Use slight wrist rotation
While moving the tool, apply a subtle wrist rotation to increase contact and effectiveness. This helps promote even material removal and surface flattening.
Let the weight do the work
The rolling pin weighs approximately 3 kg, so no additional downward force is required. The back-and-forth motion provides sufficient pressure for proper surface conditioning.
Monitor progress
Continue until the surface shows a consistent, uniform finish, indicating the rotor housing has been flattened and conditioned.