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Another important feature of the industrial jackhammer is its durability
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1930
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1986
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814
The couplings of drilling rods are another area of technological advancement. These connections must withstand tremendous forces, including torsion, compression, and tension. Advanced thread designs and materials science have led to couplings that are more reliable and easier to maintain Advanced thread designs and materials science have led to couplings that are more reliable and easier to maintain
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First, an elastomer, most often nitrile, is vulcanised to a metal ring. This creates a stiffening effect that includes a specialised metal tension spring directly behind the sealing lip, keeping the oil seal firmly in place against the moving part.