Seal Group CR3710 for Caterpillar Excavator Part NO.CA9W7207

5/5

Product Specifications

Part NO. CR3710
Type DF Heavy Duty Application
Dimensions
(D2*D1*2h)
90*105*26mm
Application Track Roller
Travel Motor Assy
Final Drive Assy
Travel Reduction Gear
Compatible Part NO. Caterpillar 9W 7207,6S 3285
Steel Ring Material FC15Cr3Mo Cast Iron
Steel Ring Hardness HRC65-70
O-Ring Material NBR
Linear Velocity 3m/S
Service Life 5000-8000hrs

Description

The seal group consists of two identical metal rings and two rubber rings. Its working principle is that a pair of rubber rings form a closed space with the cavity (but not in contact with the shaft) under the support of the metal rings. When the metal rings rotate, The two ground surfaces fit closely and slide relative to each other. On the one hand, they ensure good operation. On the other hand, they effectively isolate dust, water, sludge, etc. from the outside and protect the internal lubricating grease from leaking.
At Decent Machinery, we provide duo cone seals made of by using high standards in the industry. The main component of the metal ring is FC15Cr3Mo. Its hardness after heat treatment generally reaches HRC 65-72.
Rubber Ring Materials:
  • The right rubber ring should be chosen to meet the specific application requirements.
  • The most common rubber ring materials are NBR and silicone.
The table listed below gives a brief comparison between available rubber rings for reference.
Feature
NBR
LTNBR
HNBR
Silicone
Viton
Lowest Temperature
-25°C
-45°C
-40°C
-55°C
-10°C
Hightest Temperature
+110°C
+115°C
+135°C
+165°C
+180°C
Tensile Strength
Good
Good
Good
Poor
Good
Abrasion Resistance
Excellent
Excellent
Excellent
Poor
Good
Oil Resistance
Excellent
Excellent
Excellent
poor
Excellent
Cost
Low
Low
Medium
Medium
High

 

Seal group can be divided into DO, DF, and XY types according to its structure, of which DO type is the most commonly used model. At Decent Machinery,we are able to supply an extensive range of seal groups of all types to meet our clients’ unique applications . Even if those applications can’t be met with a regular product , then we will custom design for you.

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