Crankshaft balancing

[newcomer]

Anyone know where I can get this service done in SG or Msia?

 

http://www.rlengines.com/Web_Pages/Crankshaft-Balancing.html

[newcomer]

Anyone please?

[newcomer]

found a guy in kl who can do crankshaft balancing

 

+60122037052

ozie

 

he quoted me RM450 for balancing an inline 4, 1100cc crankshaft.

[niteoverday]

hw long does the process take?

[stsoh]

it is pointless to do crankshaft balancing by anyone out shop.

 

it is very specialise job coz my previous company is a aero manufacturer repair/overhaul shop dealing with it's own products turbine engines.

 

first basically if u balance the crankshaft without any clarify what specs is require.

 

second if the out shop did a perfect balance for your crankshaft n when u install your conrods n pistons it will be totally out of balance again.

 

balancing is a very specialise job only to be carried out by manufacturer or licensed workshop.

 

if u repaired your worn crankshaft n machined to spec, it is safe to use it without balancing.

it's not like your crankshaft is going to spin at 60,000~100,000 rpm like turbo-charger.

basic thing to do for your crankshaft is to check lineality on it's journal bearings alignment.

Edited February 10, 2009 by stsoh

[newcomer]

Your input is appreciated.

 

My engine is internally balanced. I changed to an after market set of pistons, wrist pins, pin lock, etc, that is why I need to rebalance the crank.

 

Yes you're right the crank will not be balanced after you installed the reciprocating weights, that's why the balancing guy needs them to compensate for balancing.

 

By the way there's no such thing as perfectly balanced crank, or 100% balance factor if that's what you mean.

 

Repairing a worn crank requires grinding of the journals, that means material removal(with the exception of thermal spray coating). Once that is done there is no longer any spec to speak.

 

Basic thing to inspect the crankshaft is checking the bearing clearances with Plastigauge and TIR of the crankpin.

 

Bro are you sure a turbo engine can rev up to 60k-100k RPM?

 

Anyways, it is not uncommon for an 1100cc engine to rev up to 10,000 RPM. A well balanced crank will reduce the vibrations and load on the bearings/journals thus making your engine smooth, reliable and lengthening service life.

 

I do think there is a point in balancing a crankshaft, only after you have changed the crank related parts which affect the balance.

Edited February 10, 2009 by newcomer

[newcomer]

hw long does the process take?

 

2 days turnaround. I'm still sourcing around for someone who I can trust the job to.

 

Edit: Googled another shop in KL

http://www.transvibro.com/service3.html

Edited February 10, 2009 by newcomer

[stsoh]

....

Bro are you sure a turbo engine can rev up to 60k-100k RPM?

turbocharger not the engine.

turbocharger spin above 50,000~100,000 rpm.

 

even so u don't have specific weights to counter all the moving parts.

i worked on many marine diesel engines in my younger years.

crankshaft with major reworks r install without balancing.