Nickel-plated ISO 6020/2 hydraulic cylinders with tie-rods

The nichel-plated CD/DK/MD series combines an electroless nickel-plated cylinder with a chrome-plated stainless steel rod, for hydraulic applications exposed to corrosive washdowns, salt-laden air or aggressive process media. The treatment withstands 1200 hours of salt spray testing (rating 10) and it is an alternative to cylinders made entirely of stainless steel. Dimensions, mountings and options follow the ISO 6020/2 tie-rod series CD/DK/MD: operating pressure up to 160 bar, bores from 25 to 200 mm. Every cylinder is individually tested to ISO 10100 before delivery.

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Standard ISO 6020/2 - DIN 24554
BORES CD: 25 - 32 - 40 - 50 - 63 - 80 - 100 mm
DK: 125 - 160 - 200 mm
MD: 25 - 32 - 40 - 50 - 63 - 80 - 100 - 125 mm
OPERATING PRESSURE Operating: 160 bar
Test: 240 bar
FLANGE Front ISO ME5
Rear ISO ME6
FEET Front and rear ISO MS2
CLEVIS With ISO MP5 joint
EXTENDED TIE-RODS Front and rear ISO MX1
Front ISO MX3
Rear ISO MX2
HIGH SEALING Max. speed: 0.5 m/s
Temperature: -20 / +80 °C
Fluid: hydraulic oil
LOW FRICTION Max. speed: 1 m/s
Temperature: -20 / +80 °C
Fluid: hydraulic oil
VITON Max. speed: 1 m/s
Temperature: -20 / +150 °C
Fluid: hydraulic oil / Phosphoric esters
HFC-FLUID Max. speed: 1 m/s
Temperature: -20 / +80 °C
Fluid: HFC-fluid
Rod material Chrome-plated stainless steel
Rod end Male thread
Female thread
Floating joint
Proximity switches Front and/or rear with protection
Magnetic switches Reed
PNP magnetoresistive
IO-LINK special sensors
Bushing drain On demande

Features and applications

Corrosion protection on a hydraulic cylinder works at two distinct levels. The first level protects the rod only: on the standard CD/DK/MD tie-rod series, the rod can be ordered in corrosion-resistant materials such as chrome-plated stainless steel or Nikrom-coated steel, while the cylinder body keeps its standard finish. The second level protects the whole cylinder: the CDNI version adds an electroless nickel plating to the cylinder itself — the plating is a treatment of the cylinder, not of the rod — combined with a chrome-plated stainless steel rod. This is the configuration for the most aggressive environments, where detergents, chemicals or salt spray attack every exposed surface, not just the rod.The electroless nickel layer is 20 µm thick, with high adhesion and a uniform coating across the machined surfaces. Corrosion resistance is verified at 1200 hours in salt spray testing, rating 10. The process contains no heavy metals and no ammonia, for a low environmental impact. For many applications, a CDNI cylinder is a practical alternative to a cylinder made entirely of stainless steel.
Typical cases: food and beverage plants where machinery is washed down with aggressive detergents and a painted surface is not acceptable; coastal or marine installations exposed to salt-laden air; process areas in contact with substances that promote corrosion; washing and cleaning lines with frequent wet cycles.

Frequently Asked Questions

When is a fully nickel-plated cylinder needed instead of a stainless steel rod alone?

A corrosion-resistant rod (stainless steel or Nikrom) protects only the sliding surface and suits applications where just the rod is exposed. When detergents, chemicals or salt spray reach the whole cylinder — as in food-industry washdowns — the CD/DK/MD version with nickel-plated cylinder and stainless steel rod protects every surface.

tags: corrosion, stainless steel
corrosionstainless steel

How can corrosion of hydraulic cylinders be prevented in aggressive environments?

Conforti offers hydraulic cylinders with stainless-steel rod and nickel-plating surface treatment, capable of ensuring protection equal to 1200 hours in salt spray, rating 10. The treatment is suitable for use in aggressive environments, for example when the machinery needs to be washed with corrosive detergents or in the presence of salt spray.

tags: applications, corrosion, stainless steel
applicationscorrosionstainless steel

Is a nickel-plated CD/DK/MD cylinder interchangeable with a standard ISO 6020/2 tie-rod cylinder?

Yes. These cylinders keep the dimensions, mountings and options of the CD/DK/MD tie-rod series to ISO 6020/2. A standard cylinder can be replaced by its nickel-plated version without redesigning the machine interfaces.

tags: applications
applications