ISO 6020-2:2015

Overview

ISO 6020-2:2015 - Hydraulic fluid power - Mounting dimensions for single rod cylinders, 16 MPa (160 bar) series - Part 2: Compact series - establishes metric mounting dimensions for compact hydraulic single-rod cylinders rated to 16 MPa (160 bar). Its purpose is to ensure interchangeability of commonly used compact cylinders while allowing manufacturers design flexibility. The compact series is especially applicable to square‑head cylinders.

Key topics and technical requirements

• Scope and purpose: Defines metric mounting dimensions and identification codes to permit interchangeable compact series cylinders at 16 MPa (160 bar).
• Bore sizes: Includes bores (mm): 25, 32, 40, 50, 63, 80, 100, 125, 160, 200 (larger compact bores 250–500 mm are covered in ISO 6020-3).
• Mounting types: Standardized mounting forms (codes per ISO 6099) such as:
  • ME 5 (Head, rectangular), ME 6 (Cap, rectangular)
  • MP 1, MP 3, MP 5 (cap/head clevis and eye types)
  • MS 2 (Side lugs), MT 1/MT 2/MT 4 (trunnions)
  • MX 1/2/3 (extended studs / tie rods)
• Piston rod characteristics: Covers piston rods with shouldered male thread ends; rod end types and accessories are specified by referenced standards (ISO 4395, ISO 8133).
• Stroke tolerances:
  • Strokes ≤ 1 250 mm: +2 / −0 mm
  • Strokes > 1 250 mm and ≤ 3 150 mm: +5 / −0 mm
  • Strokes > 3 150 mm and ≤ 8 000 mm: +8 / −0 mm
• Dimension selection and tolerances: Mounting dimensions are selected from figures/tables in the standard; tolerances and port/flange sizes are specified (see normative tables and Table 15 for mounting tolerances).
• Identification and interchangeability: Use of standardized identification statements and ISO 6099 codes is recommended to ensure compatibility between manufacturers.

Applications and users

ISO 6020-2:2015 is practical for:

• Hydraulic cylinder designers and OEMs specifying compact single-rod cylinders
• Manufacturers producing metric hydraulic cylinders and accessories
• System integrators, maintenance teams, and procurement professionals ensuring part interchangeability and replacement compatibility
• Technical documentation authors, catalogs and test reports (standard recommends a specific identification statement for literature)

Typical applications include mobile and industrial hydraulic systems where compact, high‑pressure linear actuators must be interchangeable across suppliers.

Related standards

• ISO 6020-1 (Medium series) and ISO 6020-3 (Compact series, 250–500 mm bores)
• ISO 3320 (Cylinder bores and piston rod diameters)
• ISO 6099 (Identification code for mounting dimensions and types)
• ISO 5598 (Fluid power vocabulary)
• ISO 4395 (Rod end types)
• ISO 273 (Fastener clearance holes)
• ISO 8133 (Accessories)

Keywords: ISO 6020-2:2015, hydraulic fluid power, mounting dimensions, compact series cylinders, 16 MPa, 160 bar, hydraulic cylinders, piston rod, bore sizes, mounting types, interchangeability.