Single Roll crushers are used for the crushing of soft, medium hard and friable materials, like R.O.M. Coal, Rock Phosphate, Soft limestone, Salt Shales, Slag etc,

Type are manufactured in two types :-
1. E - 11 DOS - HEAVY DUTY.
2. E - 1100L - LIGHT DUTY.

As the heavy duty crushers run at comparatively lower speed than the light duty crushers, countershaft with gear & pinion arrangement/gear box gets added in the drive system.

Otherwise in case of light duty crushers, drive is through V belts only. Many times slow speed motors with bigger diam driven pulleys are used as drive.

Working :

The Crushing of feed material takes place in the signle roll crusher, in a wedge-shaped crhsing zone, by pressure and shear.

Crushing area formed by the rotating roll and the adjustable spring loaded breaker plate. On the discharge side gap between the combs of the breaker plate & roll-tips is adjustable. The gap setting, tooth configuration, surface speed& spring load decides the end-product.

Consutruction

Crusher roll assembly is mounted on two heavy duty, overdimensioned self aligning roller bearings with steel housings with Labyrinth seals. These heavy duty pedestals are mounted on the rigid-welded, steel chassis, Toothed rings are mounted on the fabricated hub/forged shaft & clamped together by tightening bolts. These toothed rings are made of wear resistant steel like K.M.D. Mn Steel (14%) etc. as per the application.

Main shaft is an alloy steel forging with higher tensile strength. EN9, EN24 etc.

Breaker plate is suspended on a heavy hinge pin, mounted on the housing of the roll crusher. Lower end is supported on heavy duty springs and by screw & nut arrangement, its position can be altered,

1. Ratio of feed size (da) and the diam of roll (Dw) Lies between

DW
——— =4-5 (depends upon product size)
da

2. Capacity. Q = 0,5 BSV 3600 E
                     Q = M3/h
                     B = WIDTH OF ROLL
                     S = SETTING
                     V = ROLLER SPEED
                     E = FILLING FACTOR

3. SPEED OF CRUSHING : 3 M/SEC TO 8 M/SEC