Electric Torque Screwdriver

[IAmSparkytus!]

Hello

Is there an electric torque screwdriver on the market which can be used to tighten MCB terminals etc?

Cant find one which can be set at say 2.5Nm and the click when torqued to that setting.

Thanks

 

[Avo Mk8]

Here's a bargain? if you can wait until August

130524 | Norbar Torque Tools Adjustable, Calibrated Hex Torque Screwdriver, 0.45 → 9Nm, 6.35 mm Drive | RS

uk.rs-online.com

 

[mainline]

Not calibrated but worth a look.

CK Electric Screwdriver with Torque Adjustment T4930

Description E-Driver Electric Screwdriver with Torque Adjustment CK T4930 Put some power into any screw driving task with the T4930 E-driver from C.K Tools. Let the rechargeable high torque motor do the hard work, perfect for repetitive tasks such as tightening or loosening panel screws or...

www.electrical4all.co.uk

I've got a couple of these, found them to be hard to beat for the price.

Cordless Electric Screwdriver Rechargeable Drill Mini Torque Adjustment Power | eBay UK

Electric screwdriver 1+USB data cable 1+grinding head 18+connecting rod 1+universal hose 1+manual 1. Maximum torque (electric): 5N. Maximum torque (manual): 10N. Large Capacity Tools Storage Bags Rectangle Electric Drill Tool Carrying Case.

www.ebay.co.uk

 

[IAmSparkytus!]

Not calibrated but worth a look.

CK Electric Screwdriver with Torque Adjustment T4930

Description E-Driver Electric Screwdriver with Torque Adjustment CK T4930 Put some power into any screw driving task with the T4930 E-driver from C.K Tools. Let the rechargeable high torque motor do the hard work, perfect for repetitive tasks such as tightening or loosening panel screws or...

www.electrical4all.co.uk

I've got a couple of these, found them to be hard to beat for the price.

Cordless Electric Screwdriver Rechargeable Drill Mini Torque Adjustment Power | eBay UK

Electric screwdriver 1+USB data cable 1+grinding head 18+connecting rod 1+universal hose 1+manual 1. Maximum torque (electric): 5N. Maximum torque (manual): 10N. Large Capacity Tools Storage Bags Rectangle Electric Drill Tool Carrying Case.

www.ebay.co.uk

That last one is the one I have but it doesn’t click when it reaches the max of the level you put it on, and you can’t choose a specific Nm setting

 

[mainline]

That last one is the one I have but it doesn’t click when it reaches the max of the level you put it on, and you can’t choose a specific Nm setting

BOSCH GO 3.6v Gen 3 Cordless Screwdriver

The Bosch GO Professional cordless screwdriver is the perfect tool for precision tasks. Its third-generation design includes a mechanical clutch with seven torque settings, ranging from a gentle 0.1 Nm for delicate materials to a powerful 5 Nm for tougher jobs. The universal bit locker ensures...

www.toolstoreuk.co.uk

 

[IAmSparkytus!]

BOSCH GO 3.6v Gen 3 Cordless Screwdriver

The Bosch GO Professional cordless screwdriver is the perfect tool for precision tasks. Its third-generation design includes a mechanical clutch with seven torque settings, ranging from a gentle 0.1 Nm for delicate materials to a powerful 5 Nm for tougher jobs. The universal bit locker ensures...

www.toolstoreuk.co.uk

Don’t think this one disengages either when it reaches the desired torque

 

[Avo Mk8]

Don’t think this one disengages either when it reaches the desired torque

The online video's show the motor stops when the set torque is reached.
The rotating collar for changing torque clicks into the various settings, but the torque is not indicated (other than by the thickness of a line), so the values would have to be established by experiment, or a torque gauge!
Looks neat.

 

[IAmSparkytus!]

The online video's show the motor stops when the set torque is reached.
The rotating collar for changing torque clicks into the various settings, but the torque is not indicated (other than by the thickness of a line), so the values would have to be established by experiment, or a torque gauge!
Looks neat.

Hmm the videos I watched earlier didn’t show the motor disengaging. Can you send a link please?

I think it only goes up in increments of 1nM. Wonder how much difference 0.5nM makes or how many turns of a screw that would count for for example.

Think the SPD I was working with today said 2.5nM - would 3nM make that much difference?

 

[Avo Mk8]

Hmm the videos I watched earlier didn’t show the motor disengaging. Can you send a link please?

This was the first of some I watched, but I've just noticed (which I hadn't before ) that the screwdriver gets set on the screwdriver setting, not a torque setting, so I think I'm wrong! Apologies

But not sure what you mean by 'disengages', I'm sure the screwdriver will stop turning when the target torque is reached, usually achieved by a clutch slipping.

View: https://www.youtube.com/watch?v=WB_XdVGaCiA

 

[Brother Blue]

I doubt any of the above devices will have any calibration certificate for their torque settings or have any approval from the manufacturer to be used as a precision torque device so wouldn't be any use for torqueing up terminal screws.

 

[Brother Blue]

Hmm the videos I watched earlier didn’t show the motor disengaging. Can you send a link please?

I think it only goes up in increments of 1nM. Wonder how much difference 0.5nM makes or how many turns of a screw that would count for for example.

Think the SPD I was working with today said 2.5nM - would 3nM make that much difference?

that depends on the tolerance that the manufacturer has allowed in their torque spec, if they allow a tolerance of +20% then 3nM would be fine, assuming that the torque driver used is very accurately calibrated and not already operating at some tolerance above the set value.

 

[Avo Mk8]

I think it only goes up in increments of 1nM. Wonder how much difference 0.5nM makes or how many turns of a screw that would count for for example.

A Newton is 100 grams (on earth).
I was told an easy way to think of 1Nm torque, is it's a small apple (100g) held at 1 metre distance..
0.5 Nm is 50 grams at 1 metre. You wont turn a screw much more by adding that!

I've just got a Wera 1.2 - 3 Nm manual driver, calibrated. Perfectly serviceable for what I need.

 

[mainline]

The original Bosch go (push to activate) had an electronic torque.

The Bosch go 2 has a mechanical torque and also had a button as well as push to start.

The Bosch 3 I think is a bit more accurate.

The mechanical torque is far better for consumer units, but obviously isn't going to be as good as a proper torque screwdriver.