Sealing Excellence, Securing Industry

CFKS Rod Step Seal 45*60.1*6.5 Low Friction Piston Step Oil Seal Hydraulic PTFE Step Seal

The CFKS 45*60.1*6.5 Rod Step Seal is a high-performance, single-acting sealing element designed specifically for hydraulic rod applications. Combining a Bronze-filled PTFE slide ring with a high-resilience NBR O-ring energizer, this seal provides a virtually leak-free interface while maintaining exceptionally low breakout friction for precise actuator control.

  • Zero Stick-Slip: PTFE compound ensures smooth rod movement even at low speeds or high pressures.

  • High Pressure Integrity: Engineered to withstand operating pressures up to 40 MPa (400 Bar).

  • Compact 6.5mm Profile: Precision-fit for $45 \times 60.1 \times 6.5$mm grooves, compatible with ISO 7425-2 standards.

Find your sealing solution with CFKS — contact us for a quote.

Brand Name CFKS OEM  Accpetable
Material NBR FKM Silicone  Features  wear resistance
Dimensions Customized Certificate  ISO9001/TS16949
Type Step Seal  Packing 1 pc per bag

 

The CFKS Rod Step Seal operates on the principle of an asymmetric pressure distribution profile. The “stepped” geometry of the PTFE ring creates a sharp sealing edge on the pressure side to block fluid, while the shallower angle on the atmospheric side allows a microscopic oil film to be “pumped” back into the cylinder during the return stroke. This prevents external leakage while ensuring the rod remains lubricated. The internal O-ring acts as a constant elastic energizer, compensating for rod deflection and ensuring seal contact even in zero-pressure conditions.

In heavy-duty hydraulic environments, rod seals are subjected to high thermal loads and friction. Our Bronze-filled PTFE material offers significantly higher wear resistance and thermal conductivity than standard NBR or Polyurethane seals. This composite material allows the seal to operate flawlessly across a temperature range of -30°C to +110°C. The bronze particles reinforce the PTFE matrix, providing the structural “backbone” necessary to resist extrusion into the clearance gap during high-pressure spikes common in industrial presses and mobile machinery.

From a maintenance perspective, the 45*60.1*6.5 Step Seal is designed to extend the service life of both the seal and the chrome-plated rod. The low-friction nature of PTFE minimizes heat buildup, which is the primary cause of seal hardening and eventual failure. During installation, the $6.5$mm cross-section allows for easy fitting into closed grooves. We recommend using an installation sleeve to protect the sealing lip from rod threads or sharp edges, ensuring the “dry-rod” performance required for modern hydraulic systems.

Frequently Asked Questions (FAQ)

Why does my CFKS oil seal fail prematurely? Common causes and prevention tips2025-06-26T15:44:39+08:00

Premature oil seal failure can result from improper installation, poor shaft finish, incorrect material selection, or excessive pressure. To prevent this, ensure the shaft surface is smooth and within tolerance, use correct tools during installation, and choose seals made from materials compatible with your media and temperature.

How to correctly install a CFKS industrial oil seal to avoid leakage2025-06-26T16:04:32+08:00

Always clean the shaft and bore before installation. Use appropriate seal drivers to avoid deformation. Lubricate the lip before fitting to reduce friction during the first rotation. Ensure the seal is seated evenly and not tilted to avoid leaks.

What to do when your CFKS hydraulic seal is leaking under pressure2025-05-20T16:33:14+08:00

Check if the pressure exceeds the seal’s rated limit. Examine for wear, hardening, or improper installation. Replace the seal if damaged, and consider upgrading to a high-pressure CFKS seal variant. Also, verify that the housing and shaft are properly aligned.

How to choose the right CFKS oil seal for extreme operating environments2025-05-20T16:34:39+08:00

For high temperatures, aggressive chemicals, or abrasive environments, choose CFKS seals made of FKM, PTFE, or high-performance elastomers. Consider using seals with protective dust lips or metal casing. Our team can recommend the best fit for your application.

CFKS Seal Manufacturing Co., Ltd.
https://cfksseals.com/
 Email: cfksnacy@gmail.com  Mobile/WhatsApp/Wechat: (86) 188-3097-5917
Step Seal Size List
TypeStructureSIZE
STd (Step Seal)O-ring outside20*3
STd (Step Seal)O-ring outside25*3
STd (Step Seal)O-ring outside28*3
STd (Step Seal)O-ring outside30*3
STd (Step Seal)O-ring outside32*3
STd (Step Seal)O-ring outside35*3
STd (Step Seal)O-ring outside20*4
STd (Step Seal)O-ring outside25*4
STd (Step Seal)O-ring outside28*4
STd (Step Seal)O-ring outside30*4
STd (Step Seal)O-ring outside32*4
STd (Step Seal)O-ring outside35*4
STd (Step Seal)O-ring outside38*4
STd (Step Seal)O-ring outside40*4
STd (Step Seal)O-ring outside45*4
STd (Step Seal)O-ring outside50*4
STd (Step Seal)O-ring outside55*4
STd (Step Seal)O-ring outside60*4
STd (Step Seal)O-ring outside65*4
STd (Step Seal)O-ring outside70*4
STd (Step Seal)O-ring outside75*4
STd (Step Seal)O-ring outside80*4
STd (Step Seal)O-ring outside85*4
STd (Step Seal)O-ring outside90*4
STd (Step Seal)O-ring outside100*4
STd (Step Seal)O-ring outside40*6
STd (Step Seal)O-ring outside45*6
STd (Step Seal)O-ring outside50*6
STd (Step Seal)O-ring outside55*6
STd (Step Seal)O-ring outside60*6
STd (Step Seal)O-ring outside65*6
STd (Step Seal)O-ring outside70*6
STd (Step Seal)O-ring outside75*6
STd (Step Seal)O-ring outside80*6
STd (Step Seal)O-ring outside85*6
STd (Step Seal)O-ring outside90*6
STd (Step Seal)O-ring outside95*6
STd (Step Seal)O-ring outside100*6
STd (Step Seal)O-ring outside105*5
STd (Step Seal)O-ring outside110*6
STd (Step Seal)O-ring outside115*6
STd (Step Seal)O-ring outside120*6
STd (Step Seal)O-ring outside125*6
STd( Step Seal)O-ring outside130*6

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