Spur to rim job conversion dolmar/makita

[Stere]

Wondering about  an  "upgrade"from a spur to rim  on a ea4300 when I replace the sprocket?

 

Clutch Drum Cpl Dcs4630/5030/ 181223200 from Spare Parts World

WWW.SPAREPARTSWORLD.CO.UK

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Sounds like a shim is needed?

 

Dolmar 421 sprocket clutch drum options?? | Arboristsite.com

WWW.ARBORISTSITE.COM

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Yesterday I bought a used 421 for what initially looked to be a good price when it fired right up. I knew there was some...

 

Assuming an extra washer under the circlip?

 

Any advice appreciated etc...

 

 

 

[outonalimb]

Don't know if this saw is basically the same (it was .325 narrow kerf) but I converted to rim with the help of Shavey.

[shavey]

Yes it’s an easy upgrade most of the DCS 5000 and up numbers use the same clutch drum as does ea-5000 and ea-6100 if you get stuck I got some here 

[Stere]

Thankyou yeah its the same saw.

 

Did you need a shim/washer?

 

Bars seem to be wearing internally like pic below and maybe rim sprockets will help reduce the speed of bar wear....

 

 

 

 

 

[peatff]

I don't think rim job is quite what you are looking for unless there's something you're not telling us

[outonalimb]

11 hours ago, Stere said:

Thankyou yeah its the same saw.

 

Did you need a shim/washer?

 

Bars seem to be wearing internally like pic below and maybe rim sprockets will help reduce the speed of bar wear....

 

 

 

 

     Don't recall any extra washers etc. It was a straight swap of clutch drum with original.

     As the rim sprocket "floats", as does the chain on a spur sprocket, and automatically lines up with          the bar, wear on  the bar rails is not down to the sprocket not "lining up" with the bar more                        probably  the wrong gauge of bar/chain  combo or uneven sharpening.

 

Edited October 10, 2020 by outonalimb

[Stere]

Defo right chain and bar combo  and its oiling properly (nearly full oil tank to one fuel tank) and not running a over tight or over slack chain.

 

And spur sprocket wear now too bad atm

 

.325

 

Original dolmar 15" bar and and an oregon speed 15" cut both worn the same.

 

Only other thing   might of affected it I can think of if  I burred a chain a few times  when it flew off cutting blackthorn had to de-bur a few of the  rakers.

 

 

[Khriss]

Dunno, always Rule of 3 fr me, has the bar seen a few chains? K

[Dan Maynard]

I can't really see changing spur to rim should make any difference to bar slot wearing wider. If the spur is so worn it is burring drivers I guess it will help but you need to change when worn either way.

Throwing chains on the other hand can definitely burr drivers and wear the slot.

[Cut4fun]

I just hooked a friend up with 325 LGX to put on a 421.  The 421 came with 6T spur picco 3/8LP. 

Put a rim set up and 325 7T rim, it didnt have the balls to pull it better then the 6T picco set up.   So pay attention to what your changing back forth with different drives. 

Edited October 11, 2020 by Cut4fun