Latching switch

[Slick111]

OK sparkies got a delema have a old 110 volt bench disc grinder it has been converted to a foot pedal on off type switch not a momentary you step on it to start the motor can remove your foot and have to step on the pedal again to shut it off. Well the roller lever switch went bad after 50 years I have looked on line and went to a electrical supply they say nothing exists has to be a momentary mostly I think they dont want to sell me any thing due to lawsuits and such and the only thing I found on line that might work has a poor picture with a vague description is a Allen Bradley @ $87.00 not in the budget ! Is there any thing out there or a supply house that might be helpful. Ideas suggestions ?

 

[sands35]

You may need to look at a place like McMaster Carr, Grainger or Digi-key and then get creative with how it mounts in the foot switch.

 

[gregtwojeeps]

http://www.mcmaster.com/#momentary-foot-pedal-switches/=ztrqsi

 

[404]

How about the on off switch out of a canister vacuum cleaner? Those are push on push off and meant to be stepped on.

 

[gregtwojeeps]

How about the on off switch out of a canister vacuum cleaner? Those are push on push off and meant to be stepped on.

Momentary contact needed by the OP.... not latching...... he needs to turn grinder on by pressing foot on the switch and holding it down ....when foot is released, the grinder stops.

One would need to see it in person really what the OP has or a pic of it at least., as there may be a way to get creative and put in a canopy style/button/micro switch. Should look like something in the pic....

 

[wyliesdiesels]

Momentary contact needed by the OP.... not latching...... he needs to turn grinder on by pressing foot on the switch and holding it down ....when foot is released, the grinder stops.

One would need to see it in person really what the OP has or a pic of it at least., as there may be a way to get creative and put in a canopy style/button/micro switch. Should look like something in the pic....

Huh?

Thats not what the op said! The title of the thread even says latching switch. The OP wants a LATCHING switch NOT a momentary switch.

See bold below

OK sparkies got a delema have a old 110 volt bench disc grinder it has been converted to a foot pedal on off type switch not a momentary you step on it to start the motor can remove your foot and have to step on the pedal again to shut it off. Well the roller lever switch went bad after 50 years I have looked on line and went to a electrical supply they say nothing exists has to be a momentary mostly I think they dont want to sell me any thing due to lawsuits and such and the only thing I found on line that might work has a poor picture with a vague description is a Allen Bradley @ $87.00 not in the budget ! Is there any thing out there or a supply house that might be helpful. Ideas suggestions ?

 

[gregtwojeeps]

Huh?

Thats not what the op said! The title of the thread even says latching switch. The OP wants a LATCHING switch NOT a momentary switch.

See bold below

Also note the stores do not want to sell him a latching switch and FOR GOOD REASON. If a foot operated switch stays closed while the operator walks away from it, and the machine it controls stays running, it is not a safe control. He might as well use a toggle switch on the grinder. JMO

 

[Rookie2]

You know if you put more information in you get more information out ! How bout a part number or info off the switch or assembly. I have the model in view 'A' in the Mcmaster carr .http://www.mcmaster.com/#momentary-foot-pedal-switches/=ztrqsi

They can be ordered momentary or push- on-push-off (DPDT)

There is a cheap one on craigslist/Seattle but it doesn't say how it functions.

 

[iron block]

How big is the motor? If it is not too big there is a $9 switch from GC that should work (GC-35-455, rated to 1 HP @ 250VAC). Here is a link to a place in Bellevue that sells them. http://www.vetco.net/catalog/product_info.php?products_id=11442

 

[larry_g]

You know if you put more information in you get more information out ! How bout a part number or info off the switch or assembly. I have the model in view 'A' in the Mcmaster carr .http://www.mcmaster.com/#momentary-foot-pedal-switches/=ztrqsi

They can be ordered momentary or push- on-push-off (DPDT)

There is a cheap one on craigslist/Seattle but it doesn't say how it functions.

http://www.mcmaster.com/#maintained-foot-switches/=zttx5y

might try these also

lg
no neat sig line

 

[wyliesdiesels]

Also note the stores do not want to sell him a latching switch and FOR GOOD REASON. If a foot operated switch stays closed while the operator walks away from it, and the machine it controls stays running, it is not a safe control. He might as well use a toggle switch on the grinder. JMO

Huh?

Theres no difference between that and a toggle switch.

 

[gregtwojeeps]

Wylie, lets start over. My understanding is...the primary design and use for a foot/pedal operated control switch is so the operator can turn on and off the appliance .... hands free with their foot. So if the operator needs to step away from the appliance/machine etc... to be safe.... it would be best if the machine stopped operating while the operator was away from it and the machine not being monitored. ....

Therefore I know the OP asked for a latching, but you are one of the most prominent advocates on this forum for poster's safety and insist on people operating/designing and wiring equipment with ALL capable safety features in place. THe OP evens writes that no one wants to sell him a on/off switch due to liability reasons ...

So why the angst ,when I recommend a safety feature...that the OP admits was in place on the OEM foot control originally.... which denotes it was meant to be used with a momentary action switch ...from the factory. My position any clearer to you now ?

 

[ishiboo]

There are latching roller switches available online, you may have to retrofit one.

Worst case scenario, you buy a momentary switch and connect it to a latching relay (or perhaps a low-voltage latching relay as the control of a large relay/contactor) to make it work how you'd like it.

 

[wyliesdiesels]

Wylie, lets start over. My understanding is...the primary design and use for a foot/pedal operated control switch is so the operator can turn on and off the appliance .... hands free with their foot. So if the operator needs to step away from the appliance/machine etc... to be safe.... it would be best if the machine stopped operating while the operator was away from it and the machine not being monitored. ....

Therefore I know the OP asked for a latching, but you are one of the most prominent advocates on this forum for poster's safety and insist on people operating/designing and wiring equipment with ALL capable safety features in place. THe OP evens writes that no one wants to sell him a on/off switch due to liability reasons ...

So why the angst ,when I recommend a safety feature...that the OP admits was in place on the OEM foot control originally.... which denotes it was meant to be used with a momentary action switch ...from the factory. My position any clearer to you now ?

I understand where youre coming from and yes i do advocate for safety but in this case, as i said, i see no difference between a latching toggle switch and a latching foot switch.

The bench grinder at my shop has a latching toggle switch. Whats the difference, safety wise, between a latching toggle switch and a latching foot pedal switch?

I just dont see any reduction in safety with the foot pedal....if there is then by all means point it out to me....

 

[Git]

Two step On/Off $36

"for any activity where it is safe to leave a machine running unattended. Step on pedal once to activate and step again to deactivate. Simply plug our foot switch into your electrical outlet, then plug your tool into the Billy Pedal. 15 Amp."

http://www.amazon.com/dp/B000LJNJOY/?tag=atomicindus08-20

I have a version of this switch that I use with my router (deadman style) works great

 

[gregtwojeeps]

I understand where youre coming from and yes i do advocate for safety but in this case, as i said, i see no difference between a latching toggle switch and a latching foot switch.

The bench grinder at my shop has a latching toggle switch. Whats the difference, safety wise, between a latching toggle switch and a latching foot pedal switch?

I just dont see any reduction in safety with the foot pedal....if there is then by all means point it out to me....

This is like debating whether it is called a engine or a motor....

Knowing as of yet, we have no pics of the OP's foot switch, nor a explanation of why he uses one for a orbital grinder. So I am going out on a limb here and making a theoretical scenario for my reasoning, that a momentary switch on a foot pedal control .....would be beneficial for the machine operator and a bystander's safety....

Lets say the OP has his 6 y.o. grandson in the shop with him watching his Grandpa work. The OP runs out of sanding stock so, rather than pushing the latching foot pedal switch to turn the sander off, he just steps away suddenly without thinking and goes across the shop to get more sanding stock. The grinder will still be running as he walks away.... with his grandson standing there watching it go round and round...unsupervised...

If the foot pedal has a momentary switch on it, when Grandpa lifts his foot from the pedal to go get more stock, the grinder dies immediately. ...

That is all I have, I hope the OP finds whatever switch he wants to use from the input of the posters here. JMO

 

[Slick111]

OK Thanks for all the impute, ideas,suggestions and for my safety however my children were never born so I that means no grandchildren ither. The pedal is a heavy duty home made from a Mack truck air brake foot pedal my uncle made it long ago it has sentimental value.Also thanks to member 404 for the shop vac idea I went a little further stopped in to a cleaning supply store and got a industrial vacuum cleaner switch heavy duty rated @ 15 amps made in USA 15 bucks out the door I will have to fab a new bracket to make it work but very simple to do.Thanks again every one

 

[rlitman]

Also note the stores do not want to sell him a latching switch and FOR GOOD REASON...

Lets say the OP has his 6 y.o. grandson in the shop with him...If the foot pedal has a momentary switch on it, when Grandpa lifts his foot from the pedal to go get more stock, the grinder dies immediately...

No! Give it a rest.

Have you EVER seen a grinder with foot pedal momentary switch? I can say for sure that I have not. Every bench/pedestal grinder I've seen before had some sort of toggle, pushbutton, paddle, or lever switch arrangement that was not momentary. There is simply NO advantage to a momentary switch on a bench/pedestal grinder. Heck, momentary switches are not even the norm on hand-held grinders (and I've made comments before as to how I feel that they detract from, rather than add to overall safety).
I've never seen a grinder with a safety brake, so no, lifting a foot from a "deadman" pedal is not going to stop a grinder immediately. It'll keep spinning with all of its potential energy for quite some time.

Regardless, OSHA does not have any requirements for momentary switches on grinders for good reason. The biggest danger from grinders is a fracturing wheel (something that is generally preventable). The next biggest is entanglement (which is also not an issue if proper shop safety regarding hair/clothing is followed). Then you've got eye safety. Grinders are simply not the death machines you make them out to be.

I distinctly remember being a 6 year old in a shop with a 24" radial arm saw that took several minutes to spin down after being turned off. I knew well enough to stand a safe radius away (well more than 10'), and if I didn't, there's no way I would have been allowed in the shop.

 

[gregtwojeeps]

No! Give it a rest.



I did give it a rest in my post #16 above.... but instead, you have chosen to cannibalize my post # 16 and re-quote just parts of it, just to suit your narrative. You must fukin' work for MSNBC....