Hydraulic Cylinders – Piston Ø 63 mm

Speed and versatility. Hydraulic cylinders with a 63 mm piston diameter are light and compact drive units. They generate forces in the range of 5–8 tons, while offering fast extension times even with smaller pumps. Ideal for assisting steering systems, wrappers, seed drill markers, and opening flaps.
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Hydraulic cylinders Ø 63 mm – Agility in Hydraulics

In this category, you'll find double-acting hydraulic cylinders with an internal diameter of 63 mm . This size bridges the gap between very light hydraulics (40-50 mm diameter) and the agricultural standard (80 mm diameter).

Why choose a Ø 63 mm cylinder?

The main advantage of this diameter is its low oil consumption . Thanks to its smaller cylinder capacity, this actuator operates significantly faster than its larger counterparts (80 mm or 100 mm) when powered by the same pump. This is crucial in applications where dynamic movement, not just brute force, is crucial.

Force parameters (Piston surface ~31 cm²):

  • At a pressure of 160 bar : Extension force approx. 5 tons .
  • At a pressure of 200 bar : Extension force approx. 6.2 tons .
  • At a pressure of 250 bar : Extension force of nearly 7.8 tons .

Applications in agriculture and industry

Sixty-three actuators are ubiquitous in modern and older equipment:

  1. Power steering systems: This is the most popular size used when converting tractors (e.g. Ursus C-330, C-360, Zetor) to hydraulic power steering (orbitrol).
  2. Bale Wrappers and Grapples: Where speed of arm closing and opening is required.
  3. Seeder markers and tramlining: For precise control of seeding equipment.
  4. Orchard and municipal machinery: Sweepers, flail mowers (side shift).
  5. Opening gates and flaps: In chutes, silos or industrial ventilation.

Design

We offer actuators made to industrial standards:

  • Piston rod: Typically Ø 30 mm, Ø 35 mm or Ø 36 mm . Hard chrome plated for low friction and corrosion protection.
  • Mountings: Most often they are finished with self-aligning bearings (heads), which allows for compensation of minor assembly deviations and operation "in an arc".
  • Seals: Suitable for operation in a temperature range from -20°C to +80°C.

FAQ: Hydraulic Cylinders – Piston Ø 63 mm – Questions and Answers
1. What force (lifting capacity) does a cylinder with a piston diameter of 63 mm generate?

The actuator's force depends on the piston diameter and the pump's operating pressure. The working area of a 63 mm piston is approximately 31.1 cm².

  • At an operating pressure of 160 bar (often found in common agricultural tractors), this actuator will generate a powerful pushing force of approximately 5 tons (precisely about 4980 kg).
  • At a higher operating pressure of 200 bar, the pushing force increases to an impressive 6.2 tons (about 6220 kg).
  • Remember: The pulling force (when retracting the piston rod) is always lower, as the working area on the other side of the piston is reduced by the thickness of the rod itself.
2. Where are 63 mm hydraulic cylinders most commonly installed?

Due to the optimal ratio of dimensions to generated force (5-6 tons), a 63 mm diameter is the most common choice for:

  • Front loaders (Tur): As the main lifting cylinders for the frame in medium farm tractors.
  • Log splitters: Ideal for building stationary hydraulic log splitters with a working pressure of 6 tons, capable of handling hard, knotty wood.
  • Agricultural and construction machinery: Scrapers, snow plows, medium dumpers, and workshop presses.
3. How does a 63mm actuator differ in practice from a smaller 50mm one?

A jump from 50 mm to 63 mm increases the piston surface area by over 50%. This means that at the same pressure in the system (e.g., from the same pump in a tractor), you will gain 50% more lifting force.
However, one thing to remember: a larger cylinder needs more oil to fill. If you don't change to a more efficient pump, the 63 mm cylinder will extend noticeably slower than the 50 mm model.
4. What diameter piston rod should I choose for a 63 mm cylinder?

In cylinders with a 63 mm piston, piston rods are most commonly found with a thickness of 30 mm or 35 mm. The choice depends on the cylinder's stroke and working method:

  • If you are building a horizontal log splitter or a long crane arm where the cylinder has a very long stroke (e.g., 500 mm or more) and pushes a load at full extension, always choose the thickest piston rod (35 mm). This prevents so-called buckling, i.e., the rod bending under immense pressure of 6 tons.
5. What threads and connections do 63 mm actuators have?

Most cylinders of this standard have standardized connection ports with an internal thread of M22x1.5 or inch threads of 3/8" and 1/2". A standard hydraulic distributor with a flow rate of 40 l/min or 80 l/min (e.g., CETOP 03 or popular monoblock distributors) and DN8 or DN10 hydraulic hoses are entirely sufficient to operate such a cylinder.