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                 → Products
                High strength pre-tension yieldable bolt IⅠR 〔Patent pending〕
                High strength pre-tension yieldable bolt Ⅱ R 〔Patent pending〕
                High strength pre-tension bolt Ⅰ 〔Patent pending〕
                High strength pre-tension bolt Ⅱ 〔Patent pending〕
                Common strength pre-tension bolt Ⅰ 〔Patent pending〕
                Common strength pre-tension bolt Ⅱ 〔Patent pending〕
                INSTal Bolt
                Cable Bolts
                Cable Bolts

                High pre-tension spiral bolt

                High pre-tension snake bolt
                Post Grouting Bolt
                MechLok
                Friction-Lok Stabilizer
                All Thread Bar Bolt
                YIELD-LOK Bolt
                E-RAY Bolt
                Plate
                 → Contact
                Address:Jennmar Industry Park, Tongji Road, Gaoxin District, Jining, Shandong, China
                Tel:0537-2480366, 2480336
                Fax:0537-2480338
                Contact:Li Li
                E-mail:liliyf2@163.com
                High pre-tension snake bolt

                                 

                 

                 

                Technical Merits:

                 

                 

                 

                Application:

                High pre-tension: Pretension is one of the most important factors to control the surrounding strata effectly. Facilitated with specially made torque-tension nut and “sandwich” harden washer system, this bolt can increase pretention 30%-50% compared with other similar bolt.
                Equal strength: Using grade 350 rebar, specially treated thread reduce the steel working hardening and the thread part has same strength as the rebar.
                Load indicator: A load indicator is designed to monitor the install load and control the quality of installation. You can choose single class and multiclass load indicator according to requirement.

                This bolt has been successfully applied in the mining of below 800 meters and the entry
                conditions of medium stress, without yield pillar trend, little dynamic stress.

                 

                 

                 
                Specifications:
                Rocbolt Technologies China Ltd