Is British standard the same as Whitworth?

Is British standard the same as Whitworth?

The Whitworth thread was the world’s first national screw thread standard, devised and specified by Joseph Whitworth in 1841. The Whitworth thread system was later to be adopted as a British Standard to become British Standard Whitworth (BSW).

How do you convert Whitworth to MM?

Commonly used Whitworth/BSF thread dia and the mm or imperial (inch) size of the wrench opening to fit nut or head. Whitworth (inch)….

Bolt dia. AF spanner size inches Spanner size MM
11/16 inch 17.46 mm
1/2 inch 3/4 inch 19.05* mm
9/16 inch 7/8 inch 22.22 mm
5/8 inch 15/16 inch 23.81 mm

Is Whitworth the same as SAE?

Whitworth uses a 55 degree thread pitch while SAE uses 60 degree. One major difference is that the hex (nut or bolt-head) size in Whitworth is counted based on the diameter of the bolt itself.

What is the difference between AF and Whitworth spanners?

AF was introduced much later and refers to Across Flats and was related to UNC(universal national coarse) and UNF(universal national fine) threads in the USA A 1/2 inch Whitworth socket is for a nut that fits on a 1/2 inch diameter thread, and is usually 1.5 times the diameter of the screwed rod across the flats of the …

How do you identify Whitworth threads?

Use the Teesing thread gauge to determine the pitch or the TPI. The pitch is indicated in metric thread in millimeters. Whitworth thread is indicated in the number of threads per inch. Locate the possible TPI or pitch by matching the diameter measured with the thread tables below.

What is Whitworth measurement?

A Whitworth wrench is sized according to the diameter of the shank of the bolt, not the head. A 1/4 W (Whitworth) wrench is actually a bit larger than a 1/2″ American wrench—0.525″ to 0.500″. As if that wasn’t enough, in 1924 it was decided that the heads of the Whitworth bolts were too large, so they were down-sized.

Is Whitworth still used?

British Standard Whitworth (BSW) Thread Form. Sir Joseph Whitworth proposed this thread in 1841. The thread form is now redundant and has been replaced by Unified and Metric threads but there are many applications in which it is still used.

Are Whitworth threads still used?

When did England stop using Whitworth?

Whitworth and BSF officially became obsolete in 1948 following an agreement between the UK, US, and Canada to standardise on the American UNC and UNF fasteners for future use.

Can you convert a Whitworth wrench to metric size?

For example 7/16 Whitworth to mm size. You can find the Whitworth to metric conversion for any British size wrench. Whitworth wrenches are needed on your old Austin, Rolls Royce, Bentley, Jaguar, or other old British made automobile or motorcycle. Dealer in Fine German Made Hand ToolsSince 1997 Carthage, Tennessee USA ☎(615)-735-3388 BACK HOME

How do I find out the size of a Whitworth tool?

You can use the size tableon this page to find the size of the Whitworth tool you need. Whitworth tools can be difficult to identify. For example a 1/4W wrench is the same size as a 5/16BS (British Standard) wrench, and it is .525 inches across the flats, or 13.34mm.

What does the size on a Whitworth Spanner mean?

The size marked on a Whitworth or B.S.F (British Standard Fine) spanner refers to the size in inches of the threaded portion on the bolt it fits. Both Whitworth and British Standard Fine were phased out by the 1960s,but some manufacturers carried on using both on applications much later than this.

What is the difference between Whitworth and British Standard Fine?

British Standard fine is in effect the fine version of whitworth with the same thread form but with a greater number of threads per inch. The size marked on a Whitworth or B.S.F (British Standard Fine) spanner refers to the size in inches of the threaded portion on the bolt it fits.