The groove types, dimensions and tolerances specified in this standard are applicable to the installation of dust seals for piston rods of reciprocating hydraulic cylinders. There are three types of installation grooves for dust-proof rings for piston rods of reciprocating hydraulic cylinders: type A, type B, and type C.
GB/T 6578-1986 history
2008GB/T 6578-2008 Hydraulic fluid power.Cylinders.Reciprocating.Housings for rod wipers.Dimensions and tolerances
1986GB/T 6578-1986 Hydraulic fluid power--Cylinders--Reciprocating--Housings for rod wipers--Dimensions and tolerances