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igus® inc.

PO BOX 14349

East Providence

RI 02914

+1 800 521 2747
+1 401 438 7270

Rod end made of zinc die-casting with female thread, KCRM, iglide® J bearing ring, mm

  • Metallic rod end with female thread with stainless steel spherical ball for high transverse loads
  • Maintenance-free inner ring made of iglide® J
  • Right-hand thread
  • Zinc die-cast housing
  • Dimensional K series according to DIN ISO 12240
Product description
igubal® metal rod ends with female thread

igubal® rod end bearings are corrosion-resistant and can be used without problems even under harsh conditions. In humid or wet environments, they are resistant to weak acids and alkalis. The RESISTANCE to dirt and dust should be emphasized.

Steel housing for very high loads. Suitable for temperatures from -40°F to +194°F in long-term use.
  • Maintenance-free dry operation
  • Especially cost-effective
  • No external lubrication
  • High rigidity
  • Very high durability under alternating loads
  • Compensation of misalignment
  • Compensation of edge loads
  • Resistant to dirt, dust and lint
  • Resistant to corrosion and chemicals
  • Can be used in liquid media
  • Vibration-dampening
  • Suitable for rotating, oscillating and linear movements
  • Inner rings bearing arrangement with very low backlash

Typical applications
  • Mechanical engineering
  • Plant construction
  • Rail industry
  • Automation

    You can find many other application areas here: Browse all Industries
When to use it?
  • When really high tensile and axial forces occur
  • For rotating, oscillating and linear movements
  • If high-frequency oscillations/vibrations occur
  • If silent operation is required
  • If you need an electrically insulating part
  • If corrosion resistance is required
  • In combination with pneumatic cylinders and gas struts
  • When chemical resistance is required
  • If high rigidity is required
When not to use it?
  • If temperatures are higher than +194°F
  • If rotation speeds of more than 0.5 m/s are to be achieved
  • When applications must be implemented with hydraulic cylinders
  • If diameters above 30 mm are required
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igubal® bearing elements can be used with different tolerances according to each application. They are designed with a large clearance in the standard product, which enables a secure operation even under high peripheral speeds. The hole of the spherical ball is produced to a standard tolerance range E10. Shafts should also meet recommended tolerances h6 and h9. Check the inner diameter

Dynamic coefficients of friction and speeds

An important advantage of the maintenance-free igubal® bearing elements is that fast rotational movements of the supported shaft take place directly in the bearing spherical ball made of iglide® materials. The advantage therefore lies in the plastic vs. steel relationship. Polymer produces lower friction and permits high speeds, even in dry operation. Taking the radial loads into account, maximum surface speeds up to 0.5m/s rotating can be attained. By contrast, rotations of the shaft are supported directly in the inner diameter of the spherical portion. Without further ado, the maintenance-free igubal® bearing elements also allow linear movements of the shaft.

Chemical resistance of igubal® bearing elements

The bearing ring made of iglide® J is resistant to weak alkalis, weak acids as well as fuels and all types of lubricants. The moisture absorption of igubal® spherical bearings is approximately 1.3% weight in standard climatic conditions. The saturation limit submerged in water is 6.5%. This must be taken into evaluation for applications. If a lower moisture absorption is essential, a look on to the different materials is helpful.

UV resistance

The corrosion resistance of the igubal® bearing elements makes them particularly interesting for outdoor use. igubal® bearings are permanently resistant to UV radiation. A small change in color (dark coloration) of the spherical ball due to UV radiation does not affect the mechanical, electrical or thermal properties.
Technical data

Application Assistance

For further questions or product information, please contact:

Preston Souza

Product Manager - Startups Business Units


Customer Service:

Monday to Friday from 8 am - 8 pm



The terms "igus", "Apiro", "chainflex", "CFRIP", "conprotect", "CTD", "drylin", "dry-tech", "dryspin", "easy chain", "e-chain", "e-chain systems", "e-ketten", "e-kettensysteme", "e-skin", "e-spool", "flizz", "ibow", "igear", "iglidur", "igubal", "kineKIT", "manus", "motion plastics", "pikchain", "plastics for longer life", "readychain", "readycable", "ReBeL", "speedigus", "triflex", "robolink", "xirodur", and "xiros" are legally protected trademarks of the igus® GmbH/ Cologne in the Federal Republic of Germany and where applicable in some foreign countries.

igus® GmbH points out that it does not sell any products of the companies Allen Bradley, B&R, Baumüller, Beckhoff, Lahr, Control Techniques, Danaher Motion, ELAU, FAGOR, FANUC, Festo, Heidenhain, Jetter, Lenze, LinMot, LTi DRiVES, Mitsibushi, NUM,Parker, Bosch Rexroth, SEW, Siemens, Stöber and all other drive manufacturers mention in this website. The products offered by igus® are those of igus® GmbH