Company Profile
Introduction
Development
Service
Executive Profile
Contact Us

Facilities & Engineering
Manufacturing
Seal Processing

Products
Seal Designs
Installation
Materials

Read what one of our best customers says about AAI-India


Get Your FREE Catalog!


SHAFT RECOMMENDATION

Four main conditions make the seal and shaft more compatible and assist in providing optimal seal performance.

SHAFT HARDNESS

Normally seal contact area of the shaft should be Rockwell C 45 minimum. It is and important factor to prevent excessive wear, deformation, scratches or nicks, and to control the roughness or machining surface easily.

SHAFT SURFACE ROUGHNESS

The recommended shaft surface roughness is as follows:
Rotating: 10 to 20 µ inch AA (.25 µm to .50 µm AA).
Reciprocating: 5 to 10 µ inch AA (.13 µm to .25 µm AA).
This is very critical as greatly influence the amount of lip heat, thus this finish not be overlooked.

GRINDING

Rotating Shift: plunge grinding is recommended.
Reciprocating shaft: centerless grinding is acceptable.
Cast iron or stainless steel shafts for rotating applications and steel shafts for reciprocating applications, we suggest using hard chrome plating. The finishing surfaces described above are required to have no machine lead, otherwise it may actually pump fluid from wider the seal lip.

SHAFT CHAMFER

Without proper chamfer on shaft, the seal lip may be damaged or distorted resulting in dislodged garter spring. We suggest chamfer as Table 2-3 to assist in the installations process.



Table 2-3

INCHES
MILLIMETERS
S.D.
D1
S.D.
D1
S.D.
D1
S.D.
D1
Up to 1.000
S.D.-.094
4.001 to 5.000
S.D.-.220
Up to 25.00
S.D.-2.4
100.01 to 125.00
S.D.-5.6
1.001 to 2.000
S.D.-.140
5.001 to 6.000
S.D.-.260
25.01 to 50.00
S.D.-3.6
125.01 to 150.00
S.D.-6.6
2.001 to 3.000
S.D.-.166
6.001 to 10.000
S.D.-.276
50.01 to 75.00
S.D.-4.2
150.01 to 250.00
S.D.-7.0
3.001 to 4.000
S.D.-.196
-
-
 75.01 to 100.00
S.D.-5.0
-
-

SHAFT INSTALLATION

The advisable sequence of installation is to install the seal over shaft and then into the housing bore. Care should be exercised not to damage or deform the seal lip. The proper chamfer angle will minimize this problem. When installing the seal over a keyway or spline, you should employ a sleeve or bullet to protect the sealing lip from being cut.

When the shaft is installed through the seal, the centering guides for the shaft will prevent the deformation of lip and the dislodging of spring. If possible, the shaft should be rotated as it passes through the seal to reduce sliding friction.


Home | Oil Seal Designs | Oil Seal Installation | Seal Materials | Here's How We Make Oil Seals | Contact Us

Zion Garden 184/7, Madakulam Main Road, Palanganantham, Madurai-625 003. South India
Sales: 0091 (452) 260 7083, Fax: 0091 (452) 2380 0384

© 1999-2004. AAI-India. All rights reserved.
aairubber@gmail.com