#Hardinge hlv h lathe drawbar serial#
#Hardinge hlv h lathe drawbar driver#
#Hardinge hlv h lathe drawbar plus#

The circle of 60 holes for dividing are all drilled 1mm diameter toР”Р„ depth of about 3mm after initial drilling with a metric centreР”Вrill (looks similar to BS1 size, but has a 1mm pilot).My lathe has a metric gearbox, plus the option of change gears if I want to cut imperial threads. Mandrel the taper was finished off accurately using a specially made Of araldite to a steel centre piece which was turned from the solid.Р”Р„ large flange with a centre which is bored to a taper which fits the I fabricated a replacement headstock pulley from Delrin glued by means Pounds fifty at a local electronics shop). Variac feeding a 6A rated toroidal transformer (a special deal for two

The motor is driven from a 12V DC variable supply built using a surplus The three speed pulley was found in a box of junk. The strap at the front is simply to minimise vibrations. Pillars which are drilled and counterbored, and through which the motorР”В¬ase bolts pass. The motor mount is home made, consisting of two large aluminium Tensioning device is a slide from a prototype of some kind of specimen The illustrated motor is from an old car windscreen wiper with two The lathe is mounted on a piece of scrap 1 inch teak board standingР”Р„bout 1 inch off the table surface to allow room for the securing bolts. Of 0.268 inches (collet threads can usefully be cleaned up usingР”Р„ 40tpi chaser from a set of four intented to be used in a CoventryР”Вie head for cutting 1/8 inch whitworth 40tpi thread). The drawbar has a 40tpi thread for collets with an outside diamter Indication of a maker (nor is there one on any of the other castings),Р”Р„lthough from the construction style it probably dates from around 1900.

#Hardinge hlv h lathe drawbar serial#

The lathe bed is marked 'Germany' and a serial number, with no other Walshaw on Ornamental Turning.Р”Р„re for trains which I have used to cut them on the HLV-H with 3mm On cutting them on a Myford lathe with 8tpi leadscrewР”В¬an be found in the book by T. The Holtzapffel thread have rather awkward pitches.

#Hardinge hlv h lathe drawbar driver#

For the imperial bracket on the metric lathe the sum of teeth on leadscrew and driver on stud must be less than 109. Some dismantling and gear tooth counting).Р”В¬alculate trains assuming that the leadscrew pitch is 2.4mm (position 1), 1.2mm (position 2) or 0.6mm (position 3). Required for a non-standard train are given here (this was the result of Lathe is designed for various РІР‚СљroundРІР‚Сњ pitches and is thus considerably Of integral numbers of threads per inch whereas the variant in the metric The Norton type gear box in the imperial lathe is arranged to provide a range On the web (and in the manuals) presupposes you are using an imperial lathe. Standard pitches (for example Holtzapffel thread such as 9.45tpi or 25.71tpi).Р”Р‡or this purpose the Hardinge chart is not very useful and most information It is frequently desirable to be able to cut threads of non Ideally suited to the rough machining of large castings! It is virtually impossible to fault this lathe, although it is not For larger machining work I have a Hardinge HLV-H lathe in its metric

Hardinge hlv-h lathe drawbar