In-Groove™ Engineered Fit
Drops straight into standard modular In-Groove™ core engraving bodies with exact alignment tracking.


Amana Tool RCK-420 is a precision core box insert engraving replacement knife engineered for the In-Groove™ CNC Insert Engraving Router Bit System, featuring a 1/16-inch profile radius and a 5.0mm cutting height.
A solid micrograin carbide replacement insert knife featuring a core box design profile. The official designators ensure exact spatial tracking for complex fine-line mapping on dedicated In-Groove™ insert bodies.
Engineered strictly for use inside official Amana Tool In-Groove™ CNC insert engraving router bit bodies (such as RC-1075 or RC-1076). Do not attempt manual configuration outside tracking tool assemblies.
The Amana Tool RCK-420 is the authentic solid carbide core box replacement knife detailed across official In-Groove™ technical specs. Providing a 1/16-inch radius edge alongside a 5.0mm cutting depth parameter, this item mounts seamlessly into modular engraving tool assemblies.
Constructed from industrial-grade solid micrograin carbide, the insert profile guarantees exceptional structural edge toughness during heavy-duty panel runs. The specialized design allows operators to quickly switch profiles without altering machine center points.
By using insert tooling mechanics, the RCK-420 bypasses the cost and structural variation found in repeatedly sharpening traditional bits, providing consistent structural depth across high-volume carving tasks.
Technical Specifications
Drops straight into standard modular In-Groove™ core engraving bodies with exact alignment tracking.
Formed using premium micrograin solid carbide for maximum durability under continuous CNC friction loads.
Allows immediate switching between V-tip, core-box, or ball-nose insert profiles without re-zeroing software parameters.
Verify that the knife slot within the tool body is clear of dust, debris, and resin buildup before seating the RCK-420 knife. Tighten locking screws according to original system torque limits to prevent balancing anomalies or damage during high-velocity rotation. Review machine parameter guidelines and use appropriate safety guards on the CNC platform.
The Amana Tool RCK-420 combines a strict 1/16-inch radius curvature with a 5.0mm cutting height configuration. It offers an efficient alternative to traditional tooling for commercial CNC signs, detailed artistic routing, and industrial engraving.
The Amana Tool RCK-420 is the authentic solid carbide core box replacement knife detailed across official In-Groove™ technical specs. Providing a 1/16-inch radius edge alongside a 5.0mm cutting depth parameter, this item mounts seamlessly into modular engraving tool assemblies.