Replacement Push Knob for Brass Smith Primer Feed Arm

Replacement Arm Push Knob for Brass Smith Primer Feed

The replacement arm push knob for the Brass Smith primer feed restores reliable primer feeding by replacing worn or damaged push knobs on the feed arm. Built to tight tolerances, the part improves consistency in primer seating and reduces stoppages caused by uneven pushing action.

Features, materials and compatibility

• Durable construction: metal alloy or reinforced polymer depending on the variant.
• Textured finish for secure, repeatable handling.
• Thread and shaft dimensions matched to standard Brass Smith primer feeders.
• Direct-fit replacement—no modifications required.
• Design prevents deformation under repeated cycles.

Compatibility is achieved through precisely matched thread pitch and shaft diameter so the knob fits the Brass Smith feed arm without adapters.

Workshop and reloader experience shows that installing a new push knob restores smooth primer delivery and cuts down feeder-related stoppages during high-volume sessions.

Choosing a well-made replacement helps protect the feed arm and extends the useful life of the primer feed system.

Step-by-step installation and practical tips

Prepare a clean workspace and ensure the press or feeder is in a safe state for maintenance. Remove any loose primers before disassembly.

Unscrew the worn knob with the correct tool and slide the shaft clear, inspecting the bore for debris or damage as you go.

Fit the replacement knob by hand-threading first, then finish with a snug turn. Avoid over-tightening; use only moderate torque to secure the part.

Experienced reloaders recommend running several empty cycles after installation to confirm smooth motion and consistent push distance.

Maintenance, adjustments and troubleshooting

Routine inspection is recommended: check for wear, contamination, and loose fasteners. Remove accumulated powder, metal shavings, or lubricant build-up that can interfere with operation.

Light lubrication on moving contact points reduces wear; however, excess lubricant attracts contaminants. Field experience suggests a light application at regular intervals is sufficient for most users.

If you notice increased play or inconsistent pushing, inspect the shaft and I.D. of the bore. Replacing the knob early prevents more extensive damage to the feeder mechanism.

Performance optimization tips

Always replace with parts that match the original dimensions and thread form to ensure reliable primer pickup and seating.

Workshops with high throughput often keep spare knobs and related hardware on hand to minimize downtime, a practice supported by long-term user experience.

Maintaining a simple service log of replacements and observations helps identify wear trends and schedule proactive maintenance.