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This mod is for all Daiwa 20/30s and SHV 20/30s.
These reels have a reputation for being very good strong and fast reels for the rough ground fishing and used by lots of anglers.And they are very good
But they have a weakness and this is the main drive shaft bending and wearing out,the result is lots of movement on the cranking handle as the inner part of the shaft bends/brakes and bushes wear out.
Now if this is not detected quickly this wear causes greater problems to the outer bearing and in some cases damage to the complete reel end plate.
I removed this damage shaft and found a very poor design in the shaft at the reel inner end.
Daiwa had machined the robust shaft down to below 3mm in dia to fit a retaining plate to stop the shaft being pulled out of the reel,then instead of fitting a roller bearing they fitted a brass/bronze bush to the inner housing.
So the weakness is two fold,well three fold really.
1,shaft weak at below 3mm.
2,bush fitted instead of bearing.
3,the shaft is made from brass instead of stainless steel.
So I have modified this reel by machining the end off the inner shaft and boring out and fitting a stainless steel pin.press-fit/and locked.
Then machined this pin down to fit the id of a stainless steel roller bearing.
The new bearing will not fit direct to the housing so need to shim this to fit.
Also only relieved the shaft to 4.5mm rather than under 3mm to bring back the strength at this point.
The retaining plate opened up to accommodate the larger dia.
I have now completed four reels and all are far superior that the original reel.
Also this modification only applies to shaft,and retaining plate and no butchering has been done to the reel in any way and to put reel back to normal only a shaft and plate is needed.
The other good thing is I use the old shafts and machine these back to new spec.
Few pics
Top shaft new Daiwa shaft,bottom shaft the modified shaft.
Bearing shown fitted to inner housing.
These reels have a reputation for being very good strong and fast reels for the rough ground fishing and used by lots of anglers.And they are very good
But they have a weakness and this is the main drive shaft bending and wearing out,the result is lots of movement on the cranking handle as the inner part of the shaft bends/brakes and bushes wear out.
Now if this is not detected quickly this wear causes greater problems to the outer bearing and in some cases damage to the complete reel end plate.
I removed this damage shaft and found a very poor design in the shaft at the reel inner end.
Daiwa had machined the robust shaft down to below 3mm in dia to fit a retaining plate to stop the shaft being pulled out of the reel,then instead of fitting a roller bearing they fitted a brass/bronze bush to the inner housing.
So the weakness is two fold,well three fold really.
1,shaft weak at below 3mm.
2,bush fitted instead of bearing.
3,the shaft is made from brass instead of stainless steel.
So I have modified this reel by machining the end off the inner shaft and boring out and fitting a stainless steel pin.press-fit/and locked.
Then machined this pin down to fit the id of a stainless steel roller bearing.
The new bearing will not fit direct to the housing so need to shim this to fit.
Also only relieved the shaft to 4.5mm rather than under 3mm to bring back the strength at this point.
The retaining plate opened up to accommodate the larger dia.
I have now completed four reels and all are far superior that the original reel.
Also this modification only applies to shaft,and retaining plate and no butchering has been done to the reel in any way and to put reel back to normal only a shaft and plate is needed.
The other good thing is I use the old shafts and machine these back to new spec.
Few pics
Top shaft new Daiwa shaft,bottom shaft the modified shaft.
Bearing shown fitted to inner housing.
Attached Files
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