Pot Question

[Damifino]

:laughing: I know guess how many views vrs replies, I have a Delta GR450 bench grinder. I purchased new and liked the variable speed control. 1725 - 3450 rpm.

Went to sharpen some tools and it ran at 3450 or higher, when I try to adjust speed control, no difference.

Took it apart and the pot (potentiometer) fell apart. It's a 3 wire that goes to a black box inside the grinder.

Checked all over online for a replacement delta pot, no longer available. With that being said ebay has quite a few with different ratings and am not sure which I would need.

Motor is 5 amp. Induction motor so am stuck with getting a replacement pot if possible.

 

[cjoffutt]

This place claims they can get it:

Delta Sensor #DEL-908960 - Tool Parts and Accessories - PartsWarehouse

might be worth calling to see if it's accurate or not.

 

[radios1]

take a picture so you know where the wires go, unsolder the pot, and measure the resistance on the outside terminals with an ohmmeter, that will give you the value you need for the new pot..

 

[workinonit]

Does the pot have a number on it or a resistance value. You need to know the resistance and wattage and you can get a replacement if all else fails.

 

[Damifino]

This place claims they can get it:

Delta Sensor #DEL-908960 - Tool Parts and Accessories - PartsWarehouse

might be worth calling to see if it's accurate or not.

Thanks... I called them and what I understand that would be for the whole thing, I only need the pot, he's going to check if that's available The one's I saw on ebay are around 5.00 or less

 

[Damifino]

Does the pot have a number on it or a resistance value. You need to know the resistance and wattage and you can get a replacement if all else fails.

No numbers anywhere.

 

[Damifino]

take a picture so you know where the wires go, unsolder the pot, and measure the resistance on the outside terminals with an ohmmeter, that will give you the value you need for the new pot..

It's in 2 pieces, don't think I could get a value.

 

[workinonit]

Does it go to some sort of board or electrical device or is it in line with the power that goes to the motor? Some pics would be good.

 

[Damifino]

Does it go to some sort of board or electrical device or is it in line with the power that goes to the motor? Some pics would be good.

Yes it goes into a circuit board inside of unit, I haven't removed that because when I took front panel off to access the pot it came out in 2 pieces. This would tell me it's the pot that needs replacing.

Will take some pics and post a little later, I really like this grinder but can't sharpen tools at 3450 without that dreaded blue steel color.

 

[workinonit]

If it goes to a circuit board it's a low wattage pot. Probably small. just need to figure out the resistance. If it's still intact enough you can measure it.