Bench Belt/Disc Sander On/Off Switch

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FineWine

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Nurse (R)

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#311171 20-Dec-2023 14:32

I have inherited a 2001 Wood Belt & Disc bench sander which was originaliy sold by Chevpac Machinery in Auckland. They do not have spare parts now apparently. Unfortunately the original on/off switch has been replaced with an ordinary house light switch. I wish to replace that switch with something a bit more on the safety side of amp loading etc.

PS: and yes I will be renewing the incoming wiring.

Present on/off switch

Motor Plate

Ratings plate on sander structure

My question is what amperage should my replacement switch be? I am thinking of one these two:

https://www.macma.co.nz/item/?id=328

https://www.macma.co.nz/item/?id=272

Cheers 🎅

Whilst the difficult we can do immediately, the impossible takes a bit longer. However, miracles you will have to wait for.

MikeAqua

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#3173766 20-Dec-2023 15:20

I don't have a complete answer but I would ignore the sticker that refers to 110v etc when the motor plate says 220v. You seem to have an American tool in which the motor has been replaced with a 220v motor.

I would try and fit an e-top type switch, so you can turn it off in a hurry if you need to (assuming you have room for that kind of switch).

Mike

k1w1k1d

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#3173795 20-Dec-2023 18:36

Topmaq have these switches.

10a Electromagnetic Switch Kjd6 | TopmaQ

FineWine

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#3173806 20-Dec-2023 18:44

I still worried about those amperage loadings, especially that start up load, hence the two switches I provided links for.

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Jase2985

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#3173810 20-Dec-2023 18:54

FineWine:

I still worried about those amperage loadings, especially that start up load, hence the two switches I provided links for.

dont go off what you see on the 110v label, its for a different motor.

750w/230v is less than 3.5A, add some factor in there for start up/inrush current and anything about 10A or greater will be fine. the light switch is likely only rated for 10A as well

tweake

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#3173844 20-Dec-2023 21:47

anything wrong with the wall plate?

6 amp on a 10 amp light switch is fine. in rush doesn't last for long. also the 6 amp rating is at full load, which you rarely use. also the 6 amp rating on the name plate is at odds with the 750 wat rating.

the worse thing with wood working machines is dust ingress. having a sealed switch is recommended.

FineWine

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Nurse (R)

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#3174585 22-Dec-2023 13:08

Well thanks guys for all your great information and advice.

I have installed a Kedu KJD20-10amp double pole switch purchased from MACMA Machinery and parts supplies in Tauranga - $38.00. Unfortunately they did not have the correct size mounting plate for it but I adapted an old double light switch. Tidied up the cable where it entered the cable pass through. Put four 240v spade connectors on the cable ends and the magic happened.

Merry Christmas to all you DIY folks and be safe. 🎅🍷

Whilst the difficult we can do immediately, the impossible takes a bit longer. However, miracles you will have to wait for.

SomeoneSomewhere

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#3174673 22-Dec-2023 19:11

Good to see this worked out. Just to clarify for others:

Ignore the US 110V nameplate. The motor has a rated current of 6.25A. However, inductive loads are rough on switches and motors draw significant extra startup current (5x or more).

An "AC-3" rating of 16A means the switch was designed for a motor with a rated current of up to 16A, including headroom for the starting current etc.