Product overview
The Scorpion HKII-4225 Shaft Kit (6mm 37mm) provides a factory replacement shaft for helicopter motors when the original shaft bends or breaks. Its hardened steel construction has an 8mm main diameter and a stated overall length of 92.2mm. The pinion end is reduced to 6mm to accept 6mm pinion gears. Compatibility covers both Scorpion HK-4225 and HKII-4225 motor series, making this a motor repair component rather than a complete flight platform or airframe kit.
Integration into other brushless motors depends on their requiring an 8mm shaft of the stated length; the shaft can be shortened with a Dremel tool and cut-off wheel where necessary. Servicing Scorpion motors requires provision for press removal because the shaft is a slight press fit in the aluminum front housing. Removing the setscrews alone does not free it. A bearing press or drill press is required, with the front housing supported in a wooden block to prevent warping. Weight including packaging is 36g.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Scorpion HKII-4225 Shaft Kit (6mm 37mm) |
| Product purpose | Factory replacement motor shaft kit for Scorpion HK-4225 series helicopter motors. |
| Shaft material | Hardened steel |
| Shaft diameter and length | 8mm diameter; 92.2mm lengthFor HKII-4225 series motors. |
| Pinion interface | Ground down to 6mm for installation of 6mm pinion gears.At the pinion end. |
| Motor series compatibility | Compatible with both Scorpion HK-4225 and HKII-4225 motor series. |
| Other motor fitment | Fits other brushless motors requiring an 8mm shaft of this length.Other brushless motors must require an 8mm shaft of this length. |
| Length modification | Shafts can be shortened using a Dremel tool and cut-off wheel.If necessary to fit other motors. |
| Shaft retention | Slight press fit; removing the setscrews does not release the shaft for sliding removal.In Scorpion motors with an aluminum front housing. |
| Removal equipment and support | Press out using a bearing press or drill press, with wooden support for the front housing.Support the motor front housing in a block of wood to prevent warping during shaft removal. |
| Packaged weight | 36gIncluding packaging. |
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