Overview
ISO 13726:2008 - Hydraulic fluid power - Single rod cylinders, 16 MPa (160 bar) compact series with bores from 250 mm to 500 mm - Accessory mounting dimensions. This International Standard specifies the mounting dimensions required for interchangeability of accessories for 16 MPa (160 bar) compact single-rod cylinders that conform to ISO 6020‑3. It defines standard interfaces for accessories such as rod clevises, rod eyes, pivot pins and locking plates to ensure mechanical compatibility across manufacturers.
Key topics and technical requirements
- Scope of accessories (figures and tables included):
- AP2 – Rod clevis, female thread
- AP4 – Rod eye, plain, female thread
- AA4‑L – Pivot pin (locking plate)
- AL6 – Locking plate for pivot pin
- AA4‑S – Pivot pin, plain (cotter or snap ring type)
- Mounting dimensions: Detailed dimensional tables for bores 250 mm to 500 mm (types 90, 110, 125, 140, 180) provide the physical interface data required for interchangeability.
- Material load capacity: Accessory cross-sections must be sized so the material yield strength is at least 2.5 times the maximum tensile load produced by the cylinder.
- Installation guidance:
- Tolerance f8 is recommended for plain bearing pins (see ISO 286‑2).
- Rod clevis and rod eye must be screwed firmly against the piston rod shoulder before locking.
- Lubrication: Adequate lubrication and a suitable maintenance schedule are required for satisfactory accessory performance.
- Ordering: Example designation format provided (e.g., “Rod eye ISO 13726 - 90”).
Practical applications and users
ISO 13726:2008 is essential for:
- Hydraulic cylinder manufacturers aiming for accessory interchangeability in 16 MPa (160 bar) compact series (bores 250–500 mm).
- OEMs and system integrators who specify cylinder accessories (rod clevises, rod eyes, pivot pins).
- Design and mechanical engineers ensuring compatible mounting dimensions in hydraulic actuator assemblies.
- Maintenance, procurement and aftermarket suppliers selecting replacement accessories that fit standard cylinders.
Practical benefits include reduced design rework, simplified supply chains, and guaranteed mechanical compatibility across products.
Related standards
- ISO 6020-3 - Mounting dimensions for single rod cylinders (compact series)
- ISO 8132 - Rod eyes with spherical bearing (reference for spherical bearings)
- ISO 2944, ISO 3320, ISO 5598, ISO 286‑2 - Normative references used for pressures, bore/rod sizes, vocabulary and tolerances
Keywords: ISO 13726:2008, hydraulic fluid power, accessory mounting dimensions, single rod cylinders, 16 MPa, 160 bar, compact series, ISO 6020‑3, rod clevis, rod eye, pivot pin, interchangeability.