Activated coal plow

From WebRef.org
Revision as of 17:03, 11 May 2020 by Webref (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search

With a view to applying the coal plow to seams too hard to be sheared by the normal cutting blade, German mining engineers have developed various types of power-operated cutters. One consists of a series of compressed-air picks mounted above each other; another, of a resonance pattern, houses two high-speed motors eccentrically mounted and rotating in opposite directions. The latter imparts a vibration to the cutting edge equivalent to 2,500 blows per minute with a stroke of 3/16 to 1/4 in (4.8 to 6.4 mm) and a force of approx. 200 st (181 t). Mason
Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: The Simba Pillow equipped with adjustable high & firmness plus temperature regulation. Shop Now.

SoccerGarage.com Clearance Sale