Mechanical grab

Mechanical Grab

Mechanical grab design

1.TWO-ROPE GRAB
This type of Mechanical grab is for two rope operated cranes ,One Holding Rope and One closing Rope. The grabs are specially designed for charging and discharging sand, gravel and other bulk materials. The grabs can be executed with open or closed shells or leak-proof，orange-peel, clamshell depending on the job and the type of material to be handled. The grabs are manufactured of high wear resistant steels. All bearings are heavy-duty and sealed for high performance.

2.FOUR-ROPE GRAB
This type of Mechanical grab is for four rope operated cranes. Two Holding Ropes and Two Closing Ropes. The grabs are specially designed for charging and discharging sand, gravel and other bulk materials. Mechanical grabs can be executed with open or closed shells or leak-proof, orange-peel, clamshell depending on the job and the type of material to be handled. The grabs are manufactured of high wear resistant steels. All bearings are heavy-duty and sealed for high performance.

Two rope grab parameters

Type	Volume	Density	Crane Capacity	Grab Weight	Cargo Weight	Pulley Dia
	(m3)	(t / m3)	(t)	(t)	(t)	(mm)
BS3-1.1-1.5-00	1.1	1.5	3	1.3	1.7	Æ400
BS5-2.0-1.5-00	2	1.5	5	2	3	Æ445
BS8-3.4-1.5-00	3.4	1.5	8	2.9	5.1	Æ560
BS10-4.1-1.5-00	4.1	1.5	10	3.8	6.2	Æ560
BS12-5.0-1.5-00	5	1.5	12	4.5	7.5	Æ620
BS16-6.8-1.5-00	6.8	1.5	16	5.8	10.2	Æ650

Four rope grab parameters

Type	Volume	Density	Crane Capacity	Grab Weight	Cargo Weight	Pulley Dia
	(m3)	(t / m3)	(t)	(t)	(t)	(mm)
CS3-1.1-1.5-00	1.1	1.5	3	1.3	1.7	Æ350
CS5-2.0-1.5-00	2.0	1.5	5	2.0	3.0	Æ445
CS8-3.2-1.5-00	3.2	1.5	8	3.2	4.8	Æ520
CS10-4.0-1.5-00	4.0	1.5	10	4.0	6.0	Æ560
CS12-5.0-1.5-00	5.0	1.5	12	4.5	7.5	Æ620
CS16-6.8-1.5-00	6.8	1.5	16	5.8	10.2	Æ650
CS20-8.4-1.5-00	8.4	1.5	20	7.4	12.6	Æ700
CS24-10-1.5-00	10.0	1.5	24	9.0	15.0	Æ800
CS28-12-1.5-00	12.0	1.5	28	10.0	18.0	Æ820
CS30-13-1.5-00	13.0	1.5	30	10.5	19.5	Æ880
CS35-15-1.5-00	15.0	1.5	35	12.5	22.5	Æ920
CS40-17-1.5-00	17.0	1.5	40	14.5	25.5	Æ1050
CS50-21-1.5-00	21.0	1.5	50	18.5	31.5	Æ1100
CS60-25-1.5-00	25.0	1.5	60	22.5	37.5	Æ1150
CS70-30-1.5-00	30.0	1.5	70	25.0	45.0	Æ1200
CS80-35-1.5-00	35.0	1.5	80	27.5	52.5	Æ1250
CS90-39-1.5-00	39.0	1.5	90	31.5	58.5	Æ1300
CS100-43-1.5-00	43.0	1.5	100	35.5	64.5	Æ1350

Mechanical grab features

1. Steel plate cutting by CNC cutting avoid the cutting defects by hand cutting.
2. Structural welding use gas-protection welding (welding stress is small and without cracks).
3. Pin holes are produced by means of entire boring in order to ensure size accuracy.
4. Grab arm. upper pulley block and other components are producted by means of the module processing. which ensure all parts good interchangeability. And keep the same components to bear the same force in the same circumstances. increase the equipment performance and lifetime.
5. Mechanical Grab:Bending parts are effected by means of cold process. which ensure the size and appearance of structure to meet the design requirements.
6. Paint: All structural parts are wholely effected by means of shot blasting treatment after welding and reach the standard Sa2.5. then spray epoxy zinc-rich primer. finish coat with anti-seawater or chlorinated rubber. epoxy paint or polyurethane. paint colors follow the user. paint primer thickness of about 50m thick. middle paint of the 50m. finish is 60m. Paint with domestic and international famous brands. Paint Features: Anti-corrosion. high weather resistance coat. and weldable.
7. Others not mentioned grab production standards is followed by the corporate standards and the standards of the Ministry of Communications.

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