Grewal Industries

Other Details

Grewal Forging Screw Presses are specially designed to make bolt-heads of any kinds of Bolts,Nuts, Rivets, Spikes, Motor parts, Half Shaft Axle, Engine Valves, Brass Parts, Cold bending jobs etc.

These presses are friction drive Screw Presses on which the forging blows are applied in an upward direction. The main frame of the machine is of cast iron with tested hardness and generous proportions and is supported by necessary ribs. The main spindle -carrying the friction discs runs on roller bearings fixed in brackets and bolted on the frame. Between,the brackets friction discs are mounted which drive the friction wheel. Thus imparting motion to a alloy steel screw fixed with keys and bronze nut to it. The screw nut is secured to the top cross head of frame -type ram. This ram moves axially upward when the screw which 'has no liner movement rotates. The bottom forging die is carried on the lower cross head of the ram while the top die is secured to a fixed bridge in the machine frame. This bridge simultaneously locates the lower bearing (the screw pressure bearing). Due to these design principle. the forging forces do not act on the machine frame but are entirely sustained by the ram. The machine frame resists the low torsional forces generated by screw nut and flywheel.

An ejector to bring out the pieces is provided at lower part of the ram. We can provide pneumatic , control system and Sliping Clutch at extra cost in which the flywheel is connected to the screw through spring loaded slipping clutch. Incase of over loading the clutch slips. thus avoiding costly breakdown on the pres

Technical Specifications

TECHNICAL SPECIFICATIONS OF FORGING SCREW PRESSES (UP STROKE)
Model	Capacity in numbers	Capacity in Tons	Dia of Screw mm/Inch	Stroke mm/Inch	Max Length of jobmm/Inch	Max Dia ofJobmm/inch	Side Table mm/inch	Stroke per Minute	Total Height	H.P. Reqd./R.P.M.	Wt. in Kg. Apprx.
GFP-50	3	50	75/3	300/12	200/8	12/.50	215/8.50	50	7' - 6"	5/1440	1800
GFP-100	2	100	110/4.25	400/16	300/12	19/.75	240/9.50	40	8' - 8"	7.5/1440	3000
GFP-150	1	150	130/5.25	460/18	400/16	31/1.25	265/10.50	30	10'	10/1440	4000
GFP-250	0	250	150/6	635/25	510/20	44/1.75	290/11.50	25	12'	20/1440	6500
GFP-350	00	350	180/7	760/30	610/24	56/2.25	320/12.50	20	12' - 9"	30/1440	10,000
(IN VIEW OF CONTINUOUSLY DEVELOPMENT WE RESERVES THE RIGHT TO MODIFY THE DESIGN AND DIMENSIONS WITHOUT NOTICE)