OSD-Packings (Piston packings)

Standard Material: NBR(RN712)

Profiles (Left section)


Service range

Standard Material
Material codes Pressure MPa {kgf/㎠} Max. speed
Temperature range
NBR(RN712) Hydro-pneumatic 1 {10} 0.5 ー10~80
Low pressure 1.5 {15}


OSD-piston packings are applicable to low pressure and hydro-pneumatic cylinders.
Unique double acting one-ring profile with seal lip provides similar sealing performance that allows compacter piston part.
OSD-piston packings are compatible with PSD & PPD-Packings, pneumatic seals.


  • Consider adopting split grooves if one-piece groove is technically adverse.
  • φD H9/f8 changes according to the variation of the bearing structure.
  • ※JIS standard sequence of surface roughness symbols refer to HERE.

Dimension table

Packings & Groove dimensions (Unit:mm) Part No.
D d H G D1 L Standard material(RN 712)
25 17 2.7 3.2 24.5 2 OSD-25A
32 24 2.7 3.2 31.5 2 OSD-32A
40 32 2.7 3.2 39.5 2 OSD-40A
50 40 3.5 4 49.5 2.5 OSD-50A
80 65 5.25 6 79.5 3 OSD-80A
  • ★Orders and inquiries are acceptable by part numbers. Part numbers marked ※ have been changed each part numbers. Please check HERE for the previous part number.
  • ★Part numbers in blue letters are the products in stock.
  • ★Packings with the part numbers in light Italic require the confirmation of their availability prior to ordering. These items are subject to the abolishment without notice. Reclamation of an abolished product requires producing the new tooling at your expense.
  • ★Packings are adequately packaged for the optimum storage. Refer to Cautions for the handling and
  • ★Performance and material tests on packing and seals are also available. Please contact us for more information.