Field Machining

MD&A offers an outstanding array of portable field machining and steampath repair equipment. Capabilities include the ability to on-site machine and repair horizontal joints on turbine casings. Please call MD&A for availability and pricing associated with a specific project and type of machining.

An abbreviated list of our portable equipment includes:

Portable Machining Center (Lathes - 60 to 100 tons)

• Rated capacity 60 to 100 ton machines, with a swings of 13' to 16' and a lengths of 70', 0.5-350 RPM capability for machining of seal strips, blade fits, rabbet fits, bearing journals, thrust faces, etc. Milling of blade racks, retaining locks, keyways, etc. Slow speed.

Line Boring Machine

• 2-1/2" - 4" diameter with 5ft. to 11ft. bar length for boring and facing operations diameters ranging from 4" to 60". 8" diameter with 12' to 24' bar length for boring and facing operations diameters ranging form 20" to 144". 1" - 2-1/2' diameter with up to 48" bar length for boring rotor coupling bores.

Portable Machine Shops

• Several 8' by 20' containers equipped with a 26" by 60" lathe, Bridgeport type milling machine, surface grinder, hydraulic press, and other typical small machine shop items. Self contained and requires only one connection to a 480V three-phase outlet.

Flange Facing Machine

• With an 8" to 100" diameter range, this machine is capable of facing, grooving, "back facing", and O.D. and I.D. turning. Constructed of aircraft quality aluminum, this machine is very lightweight and easy to set up and operate. With a 10 HP drive, it is capable of taking 1/4" deep cuts, and with simple attachments it can be used for pipe weld preps.

Three Axis Milling Machine

• Using precision X-Y & Z tool slides with power feeds and up to 15 HP milling heads, this machine can be used for any operation from light, precision grinding, to heavy keyway cutting, to fly cutting and to heavy duty, deep cut, face milling. Typical applications include milling/grinding of horizontal joint faces on turbine cases, and machining of base plates.

Single Point Threading Machine

• This is a unique and very special machine used for cutting out damaged internal threads and to cut new precision threads by the "single point" method. The range is from 4-1/2" to 8" diameter to a depth of 14" maximum. Example: Turbine case steam valve stud holes. Any thread from, any pitch, right or left hand threads. 15HP maximum.

Stud Removal Machines

• Essentially the same basic machines as the type described under the Single Point Threading Machine, but with specially designed tooling for fast and efficient removal of studs from 1-1/2" to 7" diameter.

Portable Honing Machine

• This is one of the few commercially available machines in our arsenal, used for honing of bores from 2" to 36" diameter.

24" Stroke Cylinder Boring Machine

• For precision machining of bores from 4" to 12" diameter and 24" depth in "open" or "blind" holes. This machine has also been proven very successful in machining and grinding of seats in certain types of large steam valves.

Hydraulic Power Units

• Sizes are 5 to100 HP with maximum flows of 5, 10, 15, 25, and 50 GPM. All power units have variable displacement piston pumps, providing accurate and infinitely variable operating (cutting) speed to all portable tools with hydraulic drive systems. Fully plumped and wired, these units operate from any 440V three-phase outlet.

Hydraulic Grinding Heads

• Heavy duty, very powerful (up to 10HP) hydraulic driven O.D. or I.D. Grinding heads for cylindrical or face grinding. Will adapt to conventional machine tools and to most of our X-Y-Z tool slides.

For more information on MD&A's shop capabilities and services please contact: MD&A at (314) 880-3000.