Balanced Sealing for Servo Motor Performance

The DMHUI BH6657E TCY Oil Seal (35×90×8mm) is designed for servo motor systems requiring both reliable oil retention and protection against external contaminants. Featuring a TCY double-lip structure, it helps maintain lubrication while reducing the entry of dust and debris.

With its balanced 8mm width and mid-range outer diameter, this seal is well-suited for a wide range of FANUC servo motor applications and automated systems.

Key Points

TCY Double Lip Sealing System
Combines a primary sealing lip for oil retention with a secondary dust lip for added protection in working environments.

Optimized for Servo Motor Applications
Designed for FANUC servo motor systems where stable and consistent sealing performance is required.

Balanced Structural Design
The 35×90×8mm configuration provides a practical balance between compact fit and structural stability.

Durable NBR Rubber Material
Offers reliable resistance to oils and lubricants while maintaining flexibility during continuous operation.

Precision Fit for Reliable Installation
Manufactured to exact metric dimensions to ensure proper seating and sealing efficiency.

Product Info

Product Name: Automated Robotic Arms Oil Seal BH6657E
OEM Part Number: BH6657E
Seal Type: TCY (Double Lip)
Material: Nitrile Rubber (NBR)
Dimensions:
Shaft (ID): 35mm
Bore (OD): 90mm
Width: 8mm
Primary Application: FANUC Servo Motor systems
Package Includes: 1 x TCY Double Lip Oil Seal (OEM # BH6657E, Size 35mm x 90mm x 8mm)

Servo motor environments often require both lubrication control and protection from external particles. DMHUI TCY seals are engineered to meet these needs.

Dual-Lip Protection Design
Helps maintain internal oil while reducing contamination from dust and debris.

Flexible NBR Sealing Edge
Ensures consistent shaft contact during high-speed rotation.

Stable Structural Configuration
The 8mm width enhances durability and consistent sealing performance.

Ideal For Use In
Servo Motors:
FANUC systems and medium-to-large servo assemblies
Automation Equipment:
Robotic systems, CNC machinery, and precision production lines
Industrial Machinery:
Rotating equipment requiring both oil retention and dust protection

FAQ

Q: What is the difference between BH6657E and BE6657F? Both are 35x90x8mm TCY seals.
A: While both share the same dimensions and TCY double-lip design, the OEM part numbers differ. BH6657E and BE6657F typically correspond to different FANUC motor series or may have subtle differences in lip compound or spring specification. Always use the exact part number from your original seal or equipment manual. A BH6657E is not guaranteed to function identically to a BE6657F.

Q: Is this seal compatible with my FANUC servo motor?
A: Yes, the BH6657E seal is designed as a direct replacement for specific FANUC servo motor systems that call for a 35x90x8mm TCY-type seal with this exact OEM number. Verify your original seal part number or check your motor documentation before ordering.

Q: How do I install this seal correctly?
A: Clean the shaft and housing bore thoroughly. Apply a thin film of clean grease to the seal lip. Use a flat installation tool or a socket that matches the outer diameter (90mm). Press the seal squarely into the housing bore, applying even pressure to the outer metal case only. The double-lip side (with the dust lip visible) must face outward toward the external environment.

Q: What fluids is this seal compatible with?
A: The NBR material is compatible with most mineral-based greases and lubricating oils used in FANUC servo motors and robotic gearboxes. Avoid use with brake fluids, phosphate esters, or high-temperature synthetic oils unless compatibility is confirmed.

Q: Do you offer other seals for FANUC servo motors and robotic arms?
A: Yes. We stock a wide range of seals for FANUC systems, including BH6656E, BE6656F, BE6657F, BC3554E, BE3554E, AH0616E, and others. Search our store by OEM part number or motor model.

Note: This product is an aftermarket replacement component. Always verify the OEM part number and dimensions from your original seal or equipment manual prior to purchase. While dimensionally similar to BE6657F, BH6657E is a distinct part number — confirm compatibility before ordering. Proper installation is essential for optimal sealing performance.

Trust in quality, choose DMHUI
DMHUI TCY oil seals provide a dependable solution for servo motor systems, supporting smooth operation and long-term stability.