email: tony@lathes.co.uk
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CST (Astra) L1, L2, L4 & L5, CM-60, Plain Mill,
Type "0" Senior & CM-60 Milling Machines

Sold originally in the UK by Scot-Urquhart of London, the  CST miller was badged as an "Astra" in the UK with versions of the machine remaining in production today (2017). The Italian maker, CST of Milan http://www.cst-snc.it/, last sold their machines in the UK through, Scot Urquhart/Hartle MTE Ltd. Arthur Street, Lakeside, Redditch, Worcestershire, B98 8JZ - though today sales appear to be direct from the factory.
Machine-tool manufacturer CST began life in 1961 as a sub-contracting machine shop, before moving, in the mid 1960s, to the production of radial-arm drills then a small range of simple, manually-operated milling machines - these being remarkably similar in the range of models offered to some of those made by the long-established English maker Tom Senior. While CST have continued to offer simple, hand-operated conventional milling machines aimed at the small professional, amateur and training markets, they have also developed a number of automatic and CNC controlled types.
Most frequently encountered in the UK of the Astra/CST range are the L2 and very similar but larger and better specified L4 and L5 "Seniors" that had, amongst other improvements, longer tables with a better range of power feed rates and, on the L5, a 2-speed motor for the spindle.
Two tiny horizontal stub-milling horizontal machines, the L1 and L2 were also listed (though the UK catalogue from the makers listed these as the F/1 and F/2) these still made to special order today. Both have always been supplied for either bench mounting or on the maker's neat, welded sheet-steel stand - but sales must always have been slow for such a simple offering and examples are seldom encountered on the used market
Simple, horizontal affairs, all "L" models have their motor contained within the casting of the main body with drive by V-belt. A handle, protruding though the left-hand side of the casing, allowing the motor-table clamp to be slackened, and the table raised (so slackening the belt) to allow changes of speed.
All models appear, in the past, to have been supplied as standard with a plain vertical head that was bereft of either quick or fine feeds. However, today this head appears on the accessories list together with a very much more useful and larger V-belt-driven powered unit, with a rapid-drilling quill, a No. 2 Morse taper spindle, a 0.5 h.p. motor and either four speeds from 620 to 1850 rpm or (with a 2-speed motor) eight from 300 to 1800 r.p.m.. However, as this is a very expensive items (at one time it was priced at very nearly the same as the one of the smaller millers) it's rarely found. The same head is also available for mounting on the Company's "Zero", "Zeromatic" and "FG1" millers.
With a screw-operated rise and fall to its knee (the lift wheel encloses  its screw to give the cheapest possible arrangement) L1 has a 13" x 4.375" table (though also listed as 12.5" x 4.42), a lever-operated longitudinal travel of 4", a screw-driven cross feed of 3.125", a vertical travel of 6.75", four spindle speeds of 620, 900, 1260 and 1850 r.p.m.  - and its 1" diameter horizontal arbor held in a No. 2 Morse taper socket and supported by a dovetail overarm. The L2 (A/2)  was built in both Standard and Junior versions, the former being for stub milling and the latter equipped with an overarm. Both were (at one time) equipped with the refinement of a ratchet lift to the knee and both lever and screw feed to the table's horizontal travel but were otherwise identical in specification.
Fitted with a larger 16" x 5.125" table, the L4 "Senior is a much more appealing and useful machine as is the top-of-the-horizontal-range L5, this being fitted with a 2-speed motor and proper, more easily controlled screw-feed knee elevation.
Still in production, though with updated styling and imported to the UK in very limited numbers, the Astra Model "0" Universal (horizontal) was originally listed as two Models, the  "A" and "B". Each had a 35" x 8" table able to be swivelled through 45 in both directions from central with drive from a 1 h.p. motor that gave the Model A power longitudinal and traverse power feeds and the Model B vertical as well - the feed rates varying from 0.4" to `9" per minutes. Rapids were available as an extra on both versions, being set at 39" per minute for, apparently, all directions of travel.  The hardened and ground chrome nickel steel spindle, fitted with a 30 INT taper nose and running in high-precision taper roller bearings, was driven through a speed-change gearbox and multi-disc clutch by a 2 h.p. 3-phase motor. Each lubricated by its own oil bath, the spindle and feeds gearboxes hardened and ground gears held on splined shafts running in ball races.
One great advantage of an owing an "Astra" milling machine is the availability of spare parts and accessories - the only European-built small miller for they can still be obtained.
Although the maker's web site is a far too simple - with very limited details of the machines available - the following (if still active) offers far more http://www.hellotrade.com/cst-milan/product.html

Astar L1 (A/1) "Stub Horizontal" Miller

Astar L2 (A/2)  Junior "Stub Horizontal" Miller fitted with a vertical head

A later version of Astra L2 Junior

Astra: simple non-quill-feed vertical head

Astra listed as an L2/L4 miller with ratchet rise-and-fall knee

CST "Universal Miller" by CST of  Milan fitted with the
very expensive powered vertical head with quill feed

Astra Type "0" |
Still in production, though with more modern styling and imported to the UK in very limited numbers, the CST/ Astra Model "0" Universal (horizontal) was originally listed as two Models, the  "A" and "B". Each had a 35" x 8" table able to be swivelled through 45 in both directions from central with drive from a 1 h.p. motor that gave the Model A power longitudinal and traverse power feeds and the Model B vertical as well - the feed rates varying from 0.4" to `9" per minutes. Rapids were available as an extra on both versions, being set at 39" per minute for, apparently, all directions of travel.  The hardened and ground chrome nickel steel spindle, fitted with a 30 INT taper nose and running in high-precision taper roller bearings, was driven through a speed-change gearbox and multi-disc clutch by a 2 h.p. 3-phase motor. Each lubricated by its own oil bath, the spindle and feeds gearboxes hardened and ground gears held on splined shafts running in ball races.

Listed as the Astra "High-speed Plain Milling Machine" this model had separate motors for the spindle and table feeds - the latter being applied both longitudinally and in traverse. 27.5" x 7" the table had 16 inches of longitudinal travel (15 inches under power from a o.3 h.p. motor) 6 inches across and 10.5 inches vertically. Using a 1 h.p. motor, the six spindle speeds spanned 115 to 1500 r.p.m.


Still listed in 2017, though imported to the UK in very limited numbers, the Astra Model "0" Universal (horizontal) was originally listed as two Models, the  "A" and "B". Each had a 35" x 8" table able to be swivelled through 45 in both directions from central with drive from a 1 h.p. motor that gave the Model A power longitudinal and traverse power feeds and the Model B vertical as well - the feed rates varying from 0.4" to `9" per minutes. Rapids were available as an extra on both versions, being set at 39" per minute for, apparently, all directions of travel.  The hardened and ground chrome nickel steel spindle, fitted with a 30 INT taper nose and running in high-precision taper roller bearings, was driven through a speed-change gearbox and multi-disc clutch by a 2 h.p. 3-phase motor. Each lubricated by its own oil bath, the spindle and feeds gearboxes hardened and ground gears held on splined shafts running in ball races.

email: tony@lathes.co.uk
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CST (Astra) L2 Junior
& L4 & L5 Senior
Milling Machines