Needs Pictures: 0
Results 1 to 8 of 8
Thread: Bench Grinder Capacitor
-
27th Mar 2024, 07:00 PM #1
Bench Grinder Capacitor
The capacitor on my dad’s old bench grinder has given up the ghost.
On the capacitor it says 110 volts, can I replace it with a capacitor that is 240 volts?
Sent from my iPad using Tapatalk
Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012
-
27th Mar 2024, 07:13 PM #2Senior Member
- Join Date
- Sep 2008
- Location
- Narrabeen, Sydney NSW Australia
- Posts
- 101
Surprised it didn't go bang given that it's rated for ~50% of the actual line voltage, suppose it's a testimony to the quality of the original unit that it didn't, overbuilt with huge headroom and margin for safety - I would definitely be replacing it with the 240 volt equivalent.
-
27th Mar 2024, 07:25 PM #3
Hi Mark, Guys,
With capacitors you can always use one of a higher voltage, never less. As far a capacitance is concerned, electrolytic capacitors have a quite wide tolerance value, usually as much as plus or minus 20%. So the actual value is not as critical as would be thought. AC rated capacitors can be connected either way round ! The only consideration is if it has a metal case that is connected to one of the terminals, in this case it has to be wired the right way round.Best Regards:
Baron J.
-
27th Mar 2024, 08:11 PM #4
The yellow cap covers the terminals.
The grinder is probably older than me, it was in dad’s shed as long as I can remember.
What I don’t understand is that Australia is 240volt, why would they put a 110 volt capacitor in an Australian built machine?
Sent from my iPad using Tapatalk
Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012
-
27th Mar 2024, 08:13 PM #5
Agree, I've seen higher rated capacitors like 280, etc, used in 240v, but are usually 240 or 250v.
There are some good online tutorials to help out if needed.
Sent from my SM-A235F using TapatalkUsing Tapatalk
-
27th Mar 2024, 08:51 PM #6Novice
- Join Date
- May 2018
- Location
- Brisbane
- Posts
- 12
bench grinder gap.
-
28th Mar 2024, 01:59 AM #7Diamond Member
- Join Date
- Feb 2013
- Location
- Laidley, SE Qld
- Posts
- 1,038
If the grinder is 60 plus years old it could have had more than one start capacitor swap. In a moment of need the 110V unit from a piece of surplus US electrics was tried, it worked, and was left in place.
Buy a 240V or more 150mfd ± 20% cap with the correct terminals from your local electricial components supplier or online.
-
28th Mar 2024, 10:52 AM #8Golden Member
- Join Date
- Dec 2007
- Location
- Adelaide
- Posts
- 574
I've got the exact same 8inch grinder, purchased new in the early 1980's.
Similar Threads
-
GMF 8 HD Grinder Capacitor
By Craig_Danckwert in forum METALWORK GENERALReplies: 4Last Post: 21st Jul 2023, 07:47 PM -
Ryobi Bench Drill Capacitor
By SurfinNev in forum ELECTRICALSReplies: 1Last Post: 1st Mar 2023, 07:08 AM -
Bench grinder capacitor replacement
By Grahame Collins in forum ELECTRICALSReplies: 12Last Post: 13th Jul 2017, 10:09 PM -
GMF Grinder - Capacitor Mounting Query ( and a hopeful scrounge )
By Anorak Bob in forum METALWORK GENERALReplies: 29Last Post: 28th Aug 2013, 06:57 PM -
bench top for a bench grinder
By wodstok in forum METALWORK GENERALReplies: 1Last Post: 24th Jan 2011, 03:04 PM