General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

STEEL

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

8.8 cm

Width

1.2 cm

Height

1.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Industrial Technology

Category

Tools-Machine

Sub-Category

N/A

Manufacturer

AKA

Union

Country

Canada

State/Province

Québec

City

Rock Island

Context

Country

Canada

State/Province

Alberta

Period

THESE TAPS MAY HAVE BEEN USED C. LATE 1940S- C.2000. THIS TYPE USED LATE 19THC. +

Canada

ACQUIRED WITH METAL LATHE (2001.0432) & ACCESSORIES OWNED & USED BY MR. (PAUL) HENRY NESS, BANFF, AB.. MR. NESS BOUGHT THE LATHE AND SELECTEDACCESSORIES IN 1946 FROM THE WAR ASSETS CORP., FOR USE IN HIS GARAGE HOBBY SHOP. PRESUMABLY HE SUBSEQUENTLY ACQUIRED THESE TAPS FOR USE WITH THE LATHE.

Function

USED TO CUT THREADS INSIDE A HOLLOW SHAFT.

Technical

PLUG AND BOTTOMING TAPS, USED FOR CUTTING SCREW THREADS ON THE INSIDE OF PIPES, ETC. TAPS ARE USUALLY MADE IN SETS OF THREE. THE TAPER TAP, MISSING FROM THIS SET, IS USED TO ENTER FIRST, AND GENERALLY TAPERS REGULARLY THROUGHOUT IT'S LENGTH. THE PLUG TAP, ALSO CALLED THE MIDDLE TAP, IS USUALLY CYLINDRICAL WITH 2-3 TAPERING THREADS AT THE END. THE 3RD IS THE BOTTOMING TAP, USED FOR FINISHING, AND HAS THE FULL THREAD CARRIED TO THE POINT. (REF. 2)

Area Notes

Unknown

Details

Markings

.1-.2 Both taps marked "Butterfield & Co./ Derby Line Vt. USA/ Rock Island Canada/ 1/2 1/32 X 12".

Missing

EACH TAP IS COMPLETE IN ITSELF: HOWEVER, TAPS ARE USUALLY SOLD & USED IN SETS OF 3. TAPER TAP MISSING FROM THIS SET.

Finish

Ferrous metal.

Decoration

N/A