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M250 Harrison lathe
| Small tool for removing one-way bearing from clutch
| Tool to remove clutch bell without splitting frames
| adapter for charging single cell
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Head tool mod for bench work.
| Raptor boom marker
| Swashplate levelling tools
| Dynatron / K&S blanking plugs
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outsides...
| ...and insides
| Kalt Baron circa 1981
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Raptor 30/50 One-way Adaptor
Ali blank to machine two adaptors.
| Boring complete
| Fixture for turning outside of adaptor, and centre of the one-way to use as plug-gauge
| Side view with the TT clutch centre
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Fixture from bottom, and 2 views of adaptor
| Side views of adaptor, showing pin and retaining grub-screw
| New adaptor with original one-way housing
| Original grey gear countersunk for m3 x 8 screws
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Red gear from R30, bored out and countersinks in top
| Complete assembly showing hardened pin.
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Inspired by the excellent work of Helicopter John and Craig Forcht,
this is my slant on the one way assembly. It requires accurate machining techniques to achieve a satisfactory result.
S1 All the internal boring, face flange, and outside of flange completed in one operation.
S2 Ready to bore m3 holes concentric to previous work.
S3 The fixture created to hold the internally machined item to ensure outside concentric with inside. When mounted in a three jaw chuck, runout was 0.005mm (5 microns)
The centre of the one-way bearing used as a plug-gauge. This locates the part machined item to the fixture. This can be checked by DTI on outside flange.
S4 Fixture ready to recieve part machined work.
S5 Bottom view shows counterbores for the m3 x20 screws to hold unit. and two lathe turned units.
The cross-drilling for the pin and retainer was carried out on the mill.
S6 The small hole for pin ejection is just visible on the right hand unit.
S7 New adaptor shown as fitted with the one-way. The gap must be 8mm to enable the gears to be fitted.
S8 Grey gear countersunk for m3x8 screws.
S9 Red gear from R30 has to be bored to accomodate the new adaptor, and countersunk for m3x8mm screws
S10 Final assembly.
Thanks to John for his help with the script.
 | F I L E D O W N L O A D S |  |
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