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Aggregate Testing Instruments


AGGT 011
Dorry Abrasion Testing Machine
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For testing aggregates for resistance to abrasion. It consists of a disc rotating about a shaft connected to a reduction gear box coupled to a motor. The disc rotates at 28-30 r.p.m. Under the rotating disc is a tray with an outlet to facilitate the removal of sand. Two conical hoppers are mounted on a bracket fixed to the circular tray. An arrangement is made for start and stop the flow of sand. Two holes are provided for mounting two specimens simultaneously. Two containers with weights are supplied to keep the specimens pressed against the rotating disc. Suitable for operation on 220 volts, 50 cycles, A.C. supply.
 
 
AGGT 012
Pug Mill For Grinding Lime Mortar
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It is of welded steel construction, having an internal diameter of 12 inch x 13.5 inch long (volume 1 cu.ft.) and is made of 5/16 inch thick steel plate. The drum is supported on heavy duty ball bearings on the two ends. It has an opening of 4 inch width along the full length of the drum. An air and water tight cover is provided to close the opening after the specimen has been but inside the drum. The speed of rotation is 28-30 r.p.m. The pug mill has an arrangement for being held in any position. A revolution counter for recording the revolutions of the mill is fixed on the machine. Twelve 3/4 inch dia steel balls are also supplied with the unit. It is fitted with a 1/2 H.P. electric motor to operate on single phase, 220/230 volts A.C. supply
 
 
AGGT 013
Los Angles Abrasion Testing Machine
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Used for testing crushed rocks, crushed slag, crushed and uncrushed gravel fro resistance to abrasion. The machine consists of a hallow cylinder mounted horizontally on a sturdy frame on ball bearings. There is an opening which can be closed with a dust tight cover to facilitate charging and discharging the drum with the material under test. A detachable shelf which extends throughout the inside length of the drum which catches the abrassive charge and does not allow it to fall on the cover. The drum is rotated by an electric motor through a heavy reduction gear at a speed of 30-33 r.p.m. A revolution counter is fitted to the frame. A tray is supplied for collection of the material at the end of the test. Complete with abrassive charges consisting of a set of twelve hardened steel balls, approximately 48mm dia. Suitable for operation on 440 volts, 3 phase, 50 cycles, A.C. supply
 
 

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