The 12-21396 Replacement Cutting Wheel is a hardened steel cutting disc designed for use with the 12-21395 Aviation Oil Filter Cutter (KRC-1203). It is used to open spin-on and can-style oil filters for inspection by cleanly slicing the filter housing without contaminating the internal filter media.

The wheel is mounted inside the cutter head and rotates against the filter canister as the tool is turned, gradually scoring and cutting through the aluminum or thin steel filter body. It is engineered to maintain sharpness for approximately ~50 filter cuts, depending on filter material and usage conditions.

This replacement part ensures continued precision cutting performance of the filter cutter, which is essential for aircraft maintenance practices where oil filter inspection is required to detect internal engine wear.

It is a consumable maintenance part and is typically replaced when cutting performance decreases or visible wear appears on the cutting edge.

Key features include:

Part number: 12-21396
Hardened steel cutting wheel
Designed for 12-21395 oil filter cutter (KRC-1203)
Cleanly cuts aircraft oil filter housings for inspection
Maintains sharpness for ~50 uses (typical)
Precision-machined for consistent cutting depth
Replaceable consumable maintenance component
Used in aviation engine maintenance and inspections
Compatible with aluminum and steel filter cans
Ensures clean, debris-free filter media inspection