Rolls-Royce Archives
         « Prev  Box Series  Next »        

From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Table of sizes and locations for machining a 40 m/m barrel.

Identifier  ExFiles\Box 176\3\  img071
Date  20th October 1940 guessed
  
Sizes and Locations for 40 m/m Barrel.

| | Muzzle | Breech |
| :--- | :--- | :--- |
| Drill | 3.000 dia. 4 point adjustable running steady | 5.000 dia. 4 jaw chuck. |
| 1st draw bore. | 2.875 dia. 4 point adaptor. | 5.000 dia. 4 point adjustable running steady |
| 2nd draw bore. | 2.875 dia. 4 point adaptor. | 4.325 dia. 4 point adjustable running steady. |
| Draw Ream. | 2.875 dia. 4 point adaptor | 4.160 dia. 4 point adjustable running steady. |
| Rifling. | 2.875 dia. 4 jaw chuck. | 4.125 dia. 4 point adjustable indexing adaptor. |
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙