Product overview
The Scorpion HK-2520 Shaft Kit (3.5mm) is a motor repair component intended to replace a shaft bent or broken during a landing. Its physical form is a hardened steel shaft, with the HK-2520 dimensions stated as 4mm in diameter and 64.5mm in length. The kit designation uses 3.5mm, and the stated fit for other brushless motors also refers to a 3.5mm output shaft of that length. These distinct diameter descriptions leave the exact relationship between the shaft and output dimensions unresolved.
Integration centers on the motor’s aluminum front housing, where the shaft has a slight press fit. Releasing the setscrews does not allow it to slide out: removal requires a bearing press or drill press, with the housing supported in a block of wood to prevent warping. For installation in other motors, the shaft can be shortened with a Dremel tool and cut-off wheel if needed. The supplied product is a replacement shaft kit, with a stated weight of 7.5g including packaging.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HK-2520 Shaft Kit (3.5mm) |
| Product type and purpose | Factory replacement motor shaft kit |
| Shaft material | Hardened steel |
| Shaft diameter | 4mmFor HK-2520 motors. |
| Shaft length | 64.5mmFor HK-2520 motors. |
| Other motor fit | Fit stated for other brushless motors requiring a 3.5mm output shaft, 64.5mm longOther brushless motors requiring a 3.5mm output shaft of the stated length. |
| Length adjustment | Can be shortened using a Dremel tool and cut-off wheelIf necessary to fit other motors. |
| Housing interface | Slight press fit into the aluminum front housingIn Scorpion motors. |
| Removal requirement | Removing the setscrews alone does not release the shaft; a bearing press or drill press is requiredDuring shaft removal, with the motor front housing supported in a block of wood to prevent warping. |
| Weight | 7.5gIncluding packaging. |
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