Gill Axle and Countersunk Fishplate, Huosai
TYC's repro Cooling Gill axles with countersunk heads seat into this Huosai specific Fishplate. The axles' inner ends must be secured with 2 M4 x .7 locknuts.
Mating surfaces of the Original Chinese T-slotted axles and fishplate will both eventually show wear, so these Repro parts have been hardened ( except for the axle threads) and should be fitted as a pair for this reason.
This is a kit of one axle and one fishplate for Huosai/ Nanchang cooling gill rings. Fishplates are designed to be riveted OUTSIDE the flexible chafing ring, and 2 suitable length rivets are included in the kit.
Not counting the spring loaded removable vane (that gives access to the governor), there are a total of 27 gill sections on the cooling ring.
(The rivet spacing on these outer fishplates is different from M14-P / Yak 52 cowling rings but you can get those here if that's the style fitted to your ring). See comparison picture.
Both installation and maintenance of Countersunk axles is easier compared to the Nanchang (Huosai), Yak 50 and Yak 18-T style. Those axles are fixed by a T slot and must be double nutted at their inner end.
This fishplate suits only Nanchang / Huosai gill axle outer rings. TYC's axle is actually universal and can be used on all models except Yak 55, which has a different mechanism design.