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For both of these rules of thumb (85%/90% and major minus pitch), the tap drill size yielded is not necessarily the only possible one, but it is a good one for general use. Example (metric coarse): For M7.0×1.0, major minus pitch yields 6.0, but 6.1 also works well.
It indicates the diameter of smooth-walled hole that a male thread (e.g. on a bolt) will pass through easily to connect to an internally threaded component (e.g. a nut) on the other side. For example, an M6 screw has a nominal outer diameter of 6 millimetres and will therefore be a well-located, co-axial fit in a hole drilled to 6 mm diameter.
In the 1990s, Sri Lanka Railways converted the 2 ft 6 in (762 mm) narrow gauge Kelani Valley line into 5 ft 6 in (1,676 mm) broad gauge. This was the last narrow gauge line left in Sri Lanka, and its conversion to broad gauge put the fleet of narrow gauge locomotives out of use. All operational locomotives in the country today are broad gauge.
The M1 locomotive was a class of locomotives, used by Sri Lanka Railways, imported from 1953, and manufactured by Brush Bagnall Traction. The locomotives weighed 88 long tons (89 t) had a 1,000 hp (746 kW) V12 Mirlees JS12VT four-stroke engine. The Sri Lanka railway had a fleet of 25 of these Class M1 locomotives which began introduction in ...
[6] The smallest unit was known as "Paramaanuwa", which was equal to 3.306 × 10 −11 m (1.302 × 10 −9 in). A typical span was taken roughly equal to 22.86 cm (9 in). These small units of measurement were used in making of statues and buildings. Following are the relationships between the units used in ancient times. [6] [7]
This category is located at Category:Diesel–electric locomotives of Sri Lanka. Note: This category should be empty. See the instructions for more information.
M9 Locomotive. Ten units were ordered in 1997 and delivered in 2000, costing 190 million Sri Lankan rupees each [citation needed].By 2010 only 3 were in operation due to technical problems, [needs update] [1] Various problems were described including engine malfunction, and problems with the engine control units, [3] as well as the machines requiring modifications for use on curving track.
Sri Lanka Railways M6 is a class of 16 Diesel-electric locomotives imported to Sri Lanka in 1979. Manufactured by Thyssen-Henschel in Kassel, West Germany, under licence from Electro-Motive Division of the United States.