Introduction

Rational structure i e, boom,  Central mast and refers are made out of Heavy duty structural steel frame work duly stress relieved.  The base of central mast is fixed to the winch assembly which in turn rotates on specially designed Thrust Bearing anchored to the Central Foot by means of bolts grouted in Concrete Foundation of rock.  The winch assembly comprises of special crane duty motor connected to helical speed reducers ( ELECON MAKE ) and reduction gear box dipped oil bath and gear meshed are coupled

up to a grooved steel drum. Electro hydraulic brakes are used to central the smooth lifting of weight. The winch assembly rotate on specially designed thrust bearing by mean of multiple step down gears built into The winch foot. Wire rope is of 6 x 37 construction 16mm in dia. Electric operations are controlled with Push Button Control unit Independent from the position of winch assembly. Limit Switches for Rotation Boom lowering  lifting & load lowering and lifting are provided to ensure accident free operation. The Crane will be painted with one coat of rustproof red oxide paints and two coats of enamel paints.

Technical Specifications

Metric Tons	Swing Speed	Boom Lifting Speed	Weight Lifting Speed	Wire Rope	Boom Lifting Power	Weight Lifting Power	Swing Power	Total Installed Power
30	1.2 Mtrs. / Mins.	1.79 to 7.1 Mtrs. / Min.	2.77 to 11.02 Mtrs. / Min.	18 MM	18.5 KW / 25 HP	18.5 KW / 25 HP	3.7 KW / 5 HP	39.2 KW / 56 HP
40	1.0 Mtrs. / Mins.	1.1 to 5.6 Mtrs. / Min.	1.75 to 8.7 Mtrs. / Min.	20 MM	22 KW / 30 HP	22 KW / 30 HP	5.5 KW / 7.5 HP	50 KW / 68.5 HP
50	0.9 Mtrs. / Mins.	1.0 to 5.4 Mtrs. / Min.	1.5 to 8.5 Mtrs. / Min.	22 MM	30 KW / 40 HP	30 KW / 40 HP	7.5 KW / 10 HP	69 KW / 91 HP

Dimensional Data

Metric Tones	Overall			Boom Position		Derrick Capacity
	Boom Length	Mast Height	Tie Length	Min. Length from Center Mast	Min. Length from Center Mast	Max. Capacity at 15* Angle	Max. Capacity at 82* Angle
30	40	19.2	26.0	12.0 Mtrs.	40.0 Mtrs.	30 Mt	25 Mt
	50	27.5	38.0	14.0 Mtrs.	50.0 Mtrs.	30 Mt	25 Mt
40	40	21.0	28.0	12.0 Mtrs.	40.0 Mtrs.	40 Mt	30 Mt
	50	27.5	38.0	14.0 Mtrs.	50.0 Mtrs.	40 Mt	30 Mt
50	40	21.0	28.0	12.0 Mtrs.	40.0 Mtrs.	50 Mt	38 Mt
	50	27.5	38.0	14.0 Mtrs.	50.0 Mtrs.	50 Mt	38 Mt