Tools: Screwdriver

Screwdriver :



Starrett removable handle w/ blade stored.

There are a number of different types of screwdriver tips, most (all?) of which come in different sizes: https://en.wikipedia.org/wiki/List_of_screw_drives Frearson drivers are notable for working w/ any size Frearson screw.

Note that for Imperial fasteners and tools, there are slight differences between the equivalent gauge of metal and wood-oriented fasteners.

Phillips
Designed for machine driving, and to cam out when the proper torque is reached.

Sizes

 * #0000
 * #000
 * #00
 * #0 Phillips head drivers fits screw numbers 0 and 1
 * #1 Phillips head: 2, 3, and 4
 * #2 Phillips head: 5, 6, 7, 8, and 9 (possibly certain #10)
 * #3 Phillips head: certain #10, 12, 14, and 16
 * #4 Phillips head: 18, 20, and 24
 * #5 --- this only fits 5/8 and 3/4 machine and tapping screws



Slotted
https://sizes.com/tools/screw_drive.htm#Slotted

https://www.forsterproducts.com/product/gunsmith-screwdrivers/

Sizes (Imperial)
https://sizes.com/tools/wood_screwtbl.htm

Screwdrivers/Bits
Typical sizes from: https://www.etoolpros.com/automotive-tools/KDT-80015.html



Fasteners
Note that while fastener widths are a consistently increasing diameter and width of slot, screwdrivers are typically provided in a limited number of sizes which only function in the typical case because of their having a chisel shape, enabling them to fit in a range of fastener sizes, at the expense of proper fit (only the top edge of the fastener is in contact with the screw).







Machinery's Handbook, 1914

https://jimorrisco.com/wp-content/uploads/2018/08/JI-Morris-Catalog.pdf

Wiha Bits




Fastener sizes

 * M1.0 0.25 1.9 0.7 0.25 0.30
 * M1.2 0.25 2.3 0.8 0.30 0.35
 * M1.4 0.30 2.6 0.9 0.30 0.40
 * M1.6 0.35 3.0 1.0 0.40 0.45
 * M2 0.4 3.8 1.3 0.50 0.60
 * M2.5 0.45 4.7 1.5 0.60 0.70
 * M3 0.5 5.6 1.9 0.80 0.85
 * M3.5 0.6 6.5 1.90 0.8 1.0
 * M4 0.7 7.5 2.2 1.0 1.1
 * M5 0.8 9.2 2.5 1.2 1.3
 * M6 1.0 11 3.0 1.6 1.6
 * M8 1.25 14.5 4.0 2.0 2.1
 * M10 1.5 18 5.0 2.5 2.6



JIS
http://www.vesseltools.com/hand-tools/screwdrivers/jis-japanese-industrial-standard/view-all-products.html

Casting
http://girdersandgears.com/howto/screwdrivers/screwdrivers.html

Grinding
http://smith-wessonforum.com/s-w-smithing/174948-custom-grinding-gunsmithing-screwdrivers.html

Metal

 * Volcanic Tool Co.
 * Precision High Torque Bit Driver
 * Precision Speed bit Driver --- stainless steel with a precision ball bearing with an aluminum palm ball on the end
 * http://www.scoutleatherco.com/product/hex-bit-driver-round-shorty
 * https://www.centraltools.com/59-0245-30pc-mini-tool-roll-set.html