HEAVY GRAPPLES for work in hard CONDITIONS



Produced again by
Grosstechnics LLC



Grapples with cast jaws are designed to work with metallurgical blades of a slag. The uniqueness of this grab is a one-piece jaw made of specially steel grade, selected for long-term operation, with a wear-resistant droplet material for extended service life.





The grabs are controlled by 25 ton cranes. The weight of the grab is 9975 kg, while it is capable of moving 2.5 tons of useful bulk cargo in one grip, which, taking into account the specific density of the material, is 10 tons of bulk weight. The rods are made in the form of a solid circle, which, in turn, for some types of loose and larger reinforcement can be made by forging. Blocks with increased requirements for the material, as well as high-tech hardening of the flange with high-frequency currents, ensure long-term operation even in conditions of contact with the abrasive material of the rope, guaranteeing safe operation and high productivity of the crane industry.





Specification



1. Geometric capacity, m² - 2,5

2. Own weight of the grab, kg - 9975

3. Mass of scooped cargo, t. not more than - 80

4. Jaw span, mm - 3168

5. Width of jaws, mm - 1524

6. Multiplicity of closing polypaste - 5

7. Lifting capacity of the crane when working, t. - 20

8. Group of goods according to GOST 24599-87---12

9. Bulk density, t/m3, not more than -3,2

10. Grab overall dimensions, mm


----------closed opened

lehgth 2824 3326

width 1696 1696

height 320 4038


11. Rope diameter, mm, not more than -25

12. Number of grab ropes - 4



Advantages:



Reliability



Crane products from Grosstechnics serve for many years. This is ensured by the high quality of all components and a multiple margin of safety. The grapple is stable and strong to prevent emergency situations. It might equipped with safety systems such as braking systems and safety devices to ensure the safety of the operator and others. Cast jaws are warranted for 3 years (extension to standard conditions) from the date of delivery, subject to proper use



Safety



By following the routine maintenance specified in the passport and daily monitoring of the state of the grab, crane equipment is a safe tool for handling bulk materials. The grabber contains all the quality standards. The grapple with cast jaws must be routinely examined for possible fatigue damage according to the instructions supplied in the kit



Support



Grosstechnics is the original developer, manufacturer and exporter of this type of product. We produce this equipment in series and we have a constant set of consumables. Grosstechnics is neither the assignee nor the owner of any other cast-jaw grapples without the GT branding being cast on each of the two jaws and blocks



PRODUCTION DATA





We are proud of the high technological approach to the production of our machines and mechanisms, we openly share with you photos from our production



GRAPPLE DESIGN 1



THE CHIEF DESIGNER OF THE PROJECT APPROVED THE COLOR OF THE RED-YELLOW SIGNAL TYPE FOR THE CRANE EQUIPMENT. WE UNDERSTOOD THAT WE WOULD BE VERY SIMILAR TO CHINESE CRAFTS, HOWEVER, IT WAS IMPORTANT FOR US TO HIGHLIGHT IT BRIGHTLY FOR SAFETY



MODEL RIG DETAILS "JAW"



TO DESIGN THE STRAIT AND PRODUCE THE GRAPPLE WITH MOLDED JAWS, IT TOOK US SEVERAL WEEKS TO PRODUCE A COMPLEX MODEL KIT OF WOODEN RIGGING WITH MOLDED JAWS. HOWEVER, THE EFFECT EXCEEDED OUR EXPECTATIONS, THE JAWS WERE PERFECT



TOOL PRODUCTION IS HIGH TECHNOLOGY



WE USE ONLY THE BEST SOLUTIONS THAT HAVE PROVEN FOR DECADES. FOR THE PRODUCTION OF THE MODEL SET, CNC MILLING MACHINES AND ONLY HIGH-QUALITY PLYWOOD ARE USED. NO PINE



CAST GRAPPLE JAWS V=2.5 m3



THE OBTAINED CASTINGS ARE UNDER STRICT CONTROL FOR THE PRESENCE OF SURFACE DEFECTS, AS WELL AS ULTRASONIC CONTROL OF RESPONSIBLE ZONES - FASTENING OF RODS - LUGS AND AREA OF SUPPORT OF THE GRAPPLE BOX. TECHNOLOGICAL CHARTS OF ULTRASONIC INSPECTION ARE THE PROPERTY OF GROSstechnics LLC



PRODUCTION OF A GRAPPLE WITH CAST JAWS



TOTAL WEIGHT OF 10 TONS IS A RATED PROCEDURE. ALL PROCESSES ARE CLEARLY DESCRIBED IN TECHNOLOGICAL CHARTS. QCD PERFORMS INTERIM AND OUTPUT CONTROL OF PRODUCTS. TESTS CONFIRM THE GRAPPLE'S SUITABILITY FOR USE



CAST BLOCKS FOR GRAPPLE 2.5 m3 WITH CAST JAWS



MANUFACTURED BY THE CASTING METHOD WITH SUBSEQUENT HEAT TREATMENT. BRONZE BUSHINGS PROVIDE BEARING FUNCTIONS WHEN WORKING ON SHAFTS



A tiny gallery





Grabs are tested, quality control and acceptance work. The company has a reference list.