DMHUI Radial Shaft BE6657F Oil Seal 35×90×8mm – TCY Type

The DMHUI radial shaft BE6657F oil seal is designed for stable and consistent sealing performance in servo motor applications. With a TCY double-lip structure, this oil seal provides effective oil retention while helping reduce external dust intrusion, making it suitable for FANUC servo motors and similar precision equipment.

Manufactured from NBR (Nitrile Rubber), it offers good resistance to oil, grease, and everyday operating temperatures commonly found in industrial automation environments.

Key Points

TCY Double Lip Design
Primary sealing lip helps retain lubricant, while the auxiliary dust lip assists in reducing external contamination.

NBR Rubber Construction
Balanced flexibility and durability for stable shaft contact and consistent sealing behavior.

Precision Size: 35×90×8mm
Designed to match specified shaft and housing dimensions for proper installation.

OEM Reference: BE6657F
Suitable replacement size for compatible FANUC servo motor models.

Stable Performance
Supports smooth shaft rotation and helps reduce leakage during normal operation.

Product Info

OEM Part Number: BE6657F
Seal Type: TCY (Double Lip with Dust Lip)
Material: Nitrile Rubber (NBR)
Dimensions: 35mm (Shaft) x 90mm (Bore) x 8mm (Width)
Primary Application: FANUC Servo Motors
Package Includes: 1 x TCY Double Lip Oil Seal (OEM # BE6657F, Size 35x90x8mm).

Typical Applications

• FANUC servo motors
  
• Industrial automation equipment
  
• Precision drive systems
  
• Maintenance and replacement use
  

Always confirm the shaft diameter, housing bore, and width before ordering.

Installation Notes

• Ensure the shaft surface is clean and free from sharp edges
  
• Lightly lubricate the sealing lip before installation
  
• Press the seal evenly to avoid deformation
  
• Do not reuse oil seals once removed

Product Knowledge – What Is a TCY Oil Seal?

A TCY oil seal is a type of radial shaft seal featuring two sealing lips:
The main lip maintains contact with the rotating shaft to support oil retention.
The secondary (dust) lip faces outward and helps reduce the entry of dust or fine particles.
This structure is commonly used in servo motors, industrial automation equipment, and compact drive systems, where stable sealing and cleanliness are important.

FAQ

Q1: Is this seal an exact match for the BE6657F in my FANUC servo motor?
A: Yes, this product is manufactured to replicate the dimensions and design (TCY double lip, 35x90x8mm) of the original BE6657F seal used in various FANUC servo motors. It is designed as a direct replacement.

Q2: What is the advantage of the double lip (TCY) design?
A: The double lip provides enhanced protection. The main lip seals in the lubricant (grease), while the outer dust lip keeps contaminants out. This two-way sealing greatly improves reliability in dusty or dirty operating conditions.

Q3: Can I use this seal for applications other than FANUC servo motors?
A: While specifically designed for the BE6657F application, it can be used in any rotary shaft application requiring a 35x90x8mm double lip seal, provided the environmental conditions and media are compatible with NBR rubber. Always verify your requirements before purchasing.

Q4: How should I install this seal correctly?
A: Ensure the shaft and housing are clean and free of burrs. The seal should be pressed squarely into the housing bore with the double lip side facing outward (toward the external environment). Use an appropriate installation tool to apply even pressure on the metal outer case.

Q5: Do you offer other seals for industrial motors?
A: Yes. We supply a wide range of metric oil seals suitable for various industrial, servo, and stepper motors. Please use our website search or contact us with specific part numbers or dimensions.

Note: This product is an aftermarket replacement component. Compatibility is based on the OEM part number and dimensions. Always confirm the part number and measurements from your original seal or equipment manual prior to purchase. Proper installation is critical for optimal performance.

Why Choose DMHUI?
DMHUI focuses on precision sealing components for industrial and automation use. Each oil seal is produced with attention