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[Field Marshal Dr. Opti]

Do all cordless drills produce the same amount of torque/twist if they use the same battery?

I have a Makita 8390D which can struggle at times.

[Kevin Wood]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

[Field Marshal Dr. Opti]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

[STEMO]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

It will be limited by the motor, which will draw the same amount of current no matter which size battery you use. If you want more twist, you need a higher voltage, but the motor in your drill will be rated at whatever it says on the drill.

[Field Marshal Dr. Opti]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

It will be limited by the motor, which will draw the same amount of current no matter which size battery you use. If you want more twist, you need a higher voltage, but the motor in your drill will be rated at whatever it says on the drill.

I think my Makita is a DIY jobbie that does not produce much torque because the motor has chocolate components.

[Kevin Wood]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

It will be limited by the motor, which will draw the same amount of current no matter which size battery you use. If you want more twist, you need a higher voltage, but the motor in your drill will be rated at whatever it says on the drill.

Voltage doesn't necessarily make any difference either. It's just the marketing criteria-du-jour for selling drills. 

It's really the product of the current and the voltage that determines how powerful the drill is, and then you additional factors such as the motor speed and the gearing.

[Field Marshal Dr. Opti]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

It will be limited by the motor, which will draw the same amount of current no matter which size battery you use. If you want more twist, you need a higher voltage, but the motor in your drill will be rated at whatever it says on the drill.

Voltage doesn't necessarily make any difference either. It's just the marketing criteria-du-jour for selling drills. 

It's really the product of the current and the voltage that determines how powerful the drill is, and then you additional factors such as the motor speed and the gearing.

You tell him, Kevin.

These scousers know sweet f*ck all.

[GastronomicKleptomaniac]

It's weight that's most important. The heavier the drill, the further you can bash screws into the wall with it.

[Kevin Wood]

It's weight that's most important. The heavier the drill, the further you can bash screws into the wall with it.

Yep, but the more damage you can do when you have a sense of humour failure.

My drill has an "adequate" battery, I find. It's a big grey oil cooled one that sits humming gently at the end of the road.

[Rods2]

The more powerful drills tend to be brushless, so you do not get this voltage drop across the carbon brushes. The one I've just bought has a 90Nm max torque rating & a 3 speed all metal gearbox. It also has a very high number of hammer impacts which I found made drilling into bricks at the weekend much more like slicing through butter with much less pressure on the drill than is usually required. Like many things with technology small incremental improvements is constantly improving most products.

One of the tings I always found annoying with cheap drills apert from the plastic gearboxes is the poor quality of the chucks, especially when using small drills & both these impressed me on my old Dewalt drill, but the new one is even better with the precision chuck having a grippy carbide coating, how durable this will be, only time will tell.

Both the 18v 5.0ah batteries have 3 led charge indicators which is again an improvement over other cordless drills, I've had.

As Kevin has quite rightly said, using a 240v drill is generally going to provide more power, but the portability of cordless has its uses, especially in our inclement British climate with outdoor work.

[Marks DTM Calib]

So a few facts, the V drop across a brush is bugger all, there will be more loss in the wiring and speed control device.

The main reason why brushless is now leading is cost and ease of manufacture plus a much better torque curve (power electronics are now very cheap and generally reliable)

Torque is a function of the current, more volt allows more current which can give more potential for torque....

[Bigron]

Basic torque equation:-
T = BAIN, where B is the flux density (strength) of the magnet; A is the area of the motor's windings; I is the current and N is the number of turns in the motor's windings.
Because the resultant torque is multi-factorial, the answer to to original question is not a simple one, and motor-designing colleagues have spent their engineering lives trying to make a better product!

Ron.

[STEMO]

So a few facts, the V drop across a brush is bugger all, there will be more loss in the wiring and speed control device.

The main reason why brushless is now leading is cost and ease of manufacture plus a much better torque curve (power electronics are now very cheap and generally reliable)

Torque is a function of the current, more volt allows more current which can give more potential for torque....

That's what I said, until that Kevin fella butted in.

[Marks DTM Calib]

So a few facts, the V drop across a brush is bugger all, there will be more loss in the wiring and speed control device.

The main reason why brushless is now leading is cost and ease of manufacture plus a much better torque curve (power electronics are now very cheap and generally reliable)

Torque is a function of the current, more volt allows more current which can give more potential for torque....

That's what I said, until that Kevin fella butted in.

Yep, the motor calcs are a derivative of F=BIL.

Another plus for brushless motors is that because the windings are in the stator and the magnets on the rotor, you can make them bigger easily so again....more torque!

[zirk]

It's mainly down to the motor although the battery might be the limiting factor as to how much current the motor can draw, and obviously defines how long it'll do it for.

I've just changed a shagged 1.2AH battery for a 3.0AH battery.

The drill seems to have the same amount of twist but the battery lasts far longer before a charge is required.

It will be limited by the motor, which will draw the same amount of current no matter which size battery you use. If you want more twist, you need a higher voltage, but the motor in your drill will be rated at whatever it says on the drill.

Voltage doesn't necessarily make any difference either. It's just the marketing criteria-du-jour for selling drills. 

It's really the product of the current and the voltage that determines how powerful the drill is, and then you additional factors such as the motor speed and the gearing.

You tell him, Kevin.

These scousers know sweet f*ck all.

What Stemo said is pretty much correct.

If youve replaced the Battery to a higher Drain Rate and the Drill is working the same but just lasts longer on the new Battery then that is what to expect and the Drill is doing its thing.

However is the Drill is knackered, then expect the same, same knackered performance as before just last longer on the new Battery.