Pratt & Whitney No 3 Precision Lathe

I have a Vintage Pratt & Whitney No. 3 Precision Bench Lathe plus counter shaft + motor available for sale via Ebay, see this item.

According to lathes.co.uk these lathes were available from before WW1 until shortly before WW2. 

The compound slide is stamped with the makers mark: Pratt & Whitney Co, Hartford Conn USA.

There is another tool rest. This tool rest and the compound slide are held in place with a screw that passes through the body of the lathe. On the rear of the lathe is a T slot that runs the length of the rear face.

The headstock and tailstock are secured to the body of the lathe by cams that are operated by a lever.

The spindle is unthreaded, and I believe it accepts 5/8″ x 20 TPI collets. Note that none are included with this lathe.

There is a 3 jaw chuck with the makers mark: The Cushman Chuck Co, Hardford Conn USA. I fabricated a spigot to allow the drawbar passing through the headstock spindle to retain the chuck in place.

The headstock cone pulley has two sets of indexing holes, I counted the inner one to have 48 holes and the outer one to have 64 holes. Note that the indexing pin is missing.

The tailstock has a 1MT taper to it. There is a 0-6.5mm 1MT chuck with the makers mark: Rapid HJC Hanssons MEK, Verkstad, Bredaryd, Sweden.

There is a counter shaft with a cone pulley to drive the lathe, and another pulley to accept the drive from the motor. The motor is a Crompton Parkinson 0.25BHP 1425RPM item.

The drive belt is a temporary affair made from one of my old belts – it does the job, but I hope my trousers now stay up.