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Myford Cylindrical Grinding Machines

Myford MG9

Myford Grinders MG12-HA & MG12-HAC   

More on the MG12, MG12-HPT, MG12-HA, MG12-HPT

Myford Grinders MG12-HAR, MG12-D & Grinder Accessories

Myford Series M Grinders

Manuals are available for all Myford Grinding Machines


Designed for small work, the first Myford cylindrical grinder was the tiny MG9, a manually-operated machine with the suffix "9" standing for its ability to take jobs up to 9 inches long (and up to 5 inches in diameter). Introduced in December, 1949 and made until 1954, it was a self-contained unit able to be mounted on the buyer's own bench or supplied on the maker's cabinet. The stand - just 2.5" long, 19" wide and 28.75" high - was made from braced sheet steel, had three shelves, lined with cork as was the usual Myford practice, and fitted with anti-vibration blocks recessed into the top surface.
Although beautifully made - and initially successful - the limited length capacity of the MG9 must have hindered sales for its successor; the 1953 MG12 was more successful. Again, in its first form, this was a manually operated machine but with its capacity increased to a more practical 12 inches - and subjected to several improvements during its production run. All other models of Myford grinders were hydraulically operated with, again, as time passed, each incorporating additional features that made life easier for the operator and the successful completion of work more certain.
The MG12-HA had a simple coolant settling tank, while the MG12-HAC was identical in all respects save for the fitting of coolant filtration. A development of the MG12-HA was the MG12-HAR, a model fitted with rapid advance and retraction of its wheelhead under the control of push buttons instead of a lever. Additional aids to its ease of use included the provision of what Myford called a spark-out timer and automatic retraction of the wheelhead that allowed one operator to attend to two machines at the same time by setting a 'pause' in operation; when a dead stop was reached, a timer, variable from 1 to 60 seconds, was activated and, when the set time had elapsed, the table completed its movement to the point of reversal after which a microswitch activated the wheel retraction.
The MG12-HP and MG12-HPC were two models fitted with plunge feed, these being replaced by the MG12-HPT automatic that incorporated the workhead and wheelhead designs from the MG12 and MG12-HA while also being fitted with automatic cycles for both traverse and plunge feeds. This machine, the most advanced of the company's pre-M Series and CNC machines, could work to a deadstop, or be fitted with an electronic auto-sizing attachment. The depth and rate of wheelhead in-feed were independently variable on both continuous feed (plunge grinding) and intermittent in-feed (traverse grinding). When the MG12-HPT was working on its automatic plunge cycle, a cursor on a linear scale showed the rate of advance of the wheelhead; on the automatic traverse grinding cycle, the same cursor showed the amount of in-feed applied at each reversal of the table travel.
The final range of conventional cylindrical grinders that Myford produced were the Models in the Series "M" consisting of the MG-12M, MG12-ME, MG12-HM, MG12-HPM, and MG12-HMR.
In 1963 the Myford MG12-M (Manual) was listed at £5376, the MG12-ME (hydraulic) at £6521, the MG12-HA at 7609, the MG12-HPT at £10,599, the MG12-HM at £10,634, and the MG12-HPM at £14,813. 43 years later, in June 2006, prices had risen: the MG12-M was £19,950, the  MG12-ME at £23,50, the MG12-HM at £27,850, the MG12-HMR at £33,050, and the MG12-HPM at £38,250..



Manuals are available for all Myford Grinding Machines

Myford MG9

Myford Grinders MG12-HA & MG12-HAC   

More on the MG12, MG12-HPT, MG12-HA, MG12-HPT

Myford Grinders MG12-HAR, MG12-D & Grinder Accessories

Myford Series M Grinders

lathes.co.uk
Myford Cylindrical Grinding Machines
email: tony@lathes.co.uk
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