Jim Stewart wrote:

Bill Chernoff wrote:

Does anyone have experience in adjustable torque air screwdrivers?
Can you
recommend a brand?

I want to put 4-40 TC screws into an aluminum casting.

I suppose I should go twist off a few screws with a torque wrench to see
what level of torque we need...

We are using electric screwdrivers now, but they are kind of wimpy and
need
to be recharged too often.


Believe it or not, the following has
worked for us for about 7 years with
no problems.

1. Buy $12.00 Skill rechargeable screwdriver.

2. Take it apart, throw away nicad, wire switch
directly to charger jack.

3. Make a cord to go between charging jack and
old PC-XT power supply.

4. Connect to common and + 5 volts.

The adjustable torque "feature" is your hand.
You can learn to hold the screwdriver so that
when the correct torque is hit, the screwdriver
twists in your hand taking your thumb off the
switch.

One minor update...

Strike out "throw away" and substiture "dispose
off properly"