iglide J
iglide J is a low-cost bearing for light loads, providing very low friction in almost any environment. iglide
J is specially designed for start/stop, light duty applications, and requires no external lubrication. The stick-slip
tendency is extremely low, a fact of particular significance in low-load, very low-speed applications. iglide J
can also be used for high speed, more than 3ft/second, applications, due to its low coefficient of friction.
Lab Test:
3mm I.D. sleeve in computer fan. iglide J sleeve and roller ball bearing were operated simultaneously, 5,800 R.P.M..
After constant cycling, iglide J friction measured lower than roller bearing.
Special Characteristics of iglide J
Very low coefficient of friction
Very good abrasion resistance
Reduces mechanical vibrations
Maintenance-free, dry-running
Very low moisture absorption
Suitable for stainless steel and aluminum shafting
Rotary, linear, and oscillating motion
Moisture Absorption
iglide J is constructed of a thermoplastic base material which is highly resistant to water/moisture absorption.
0.2% moisture absorption is considerably lower than most moderately-priced thermoplastic materials.
Application Example in Production
iglide J sleeve and flange bearings have been designed into a worm gear for a mixing mechanism in a juice dispenser.
iglide J’s reliable friction and low moisture absorption make it the ideal choice for this type of application.
The original design of this unit included other thermoplastic bearings which absorbed moisture and added unwanted
drag to the gear. iglide J bearings provide smooth operation and reliable tolerance.
Compressive Strength
iglide J bearings are not suited to high radial loads. The maximum permissible surface pressure, static, is 5,075
psi. However, wear increases considerably under these loads. iglide J bearings have the highest wear resistance
at loads under 300 psi.
P x V Values
iglide J bearings achieve P.V. values up to 28,000 psi x ft/min. Due to its very low coefficient of friction, surface
temperatures remain low. iglide J bearings can achieve maximum P.V. values if surface velocity, not pressure, is
the primary contributing factor.
Example
Lab test results showed very low wear with linear speeds between 70 ft/min and 295 ft/min, and pressures under
100 psi.
If P.V. value is affected by higher pressure, iglide L280 should be considered.
Operating Temperature
iglide J bearings can be used at temperatures between -40°F and a maximum of 176°F. Temperatures upwards
of 176°F result in increased wear and possibly a loss of pressfit. If long operating times are expected with
ambient temperatures reaching 140°F, an adhesive should be used to install the bearing.
Maximum service temperatures of iglide J
|
Wear
|
Continuous
|
Short |
|
Limit
|
Operation
|
Duration
|
|
175°F
|
240°F
|
390°F |
Sliding coefficient of friction for iglide J against steel
|
Dry
|
Grease
|
Oil
|
Water
|
| iglide J |
0.06 - 0.18
|
0.09
|
0.04
|
0.04
|
| Steel shaft: Hardness 50 HRC, Ra=8-16 rms |
|
|
|
|
Speed
|
Rotating
|
Oscillating
|
Linear |
|
Continuous
|
295
|
295
|
1560 |
| Short-term |
585
|
585
|
1950
|
Electrical Characteristics
iglide J bearings are electrical insulators. The volume resistance is 1015 W.
Chemical Resistance
iglide J bearings are resistant to very weak acids and diluted alkalis, as well as fuels and all types of lubricants.
The low moisture absorption allows for use in wet or damp environments.
| Medium |
Resistance |
| Alcohol |
Resistant |
| Fuels |
Resistant |
| Weak acids |
Partially resistant |
| Strong acids |
Not resistant |
| Weak alkalis |
Resistant |
| Strong alkalis |
Resistant |
| Water |
Resistant |
Shaft Material
Ground steel shafting with a hardness of at least 50 RC and a surface finish of 8—16 RMS is recommended. However,
other shaft materials can be used without significant performance loss. Stainless steel and aluminum, if hardened
as close to 50 RC as possible, have worked well with iglide J in performance testing. Good results have been achieved
with both ceramic and plastic shafting. Please consult an igus sales engineer about our experience when using
special shaft materials.
| General Characteristics |
| Density (lb/in3) |
0.055 |
| Color |
Yellow |
| Coefficient of friction,dynamic, with steel |
0.06–0.18 |
|
|
| Mechanical Characteristics |
|
| Tensile strength at 68F (psi) |
7,250 |
| Bending strength at 68F (psi) |
17,400 |
| Modulus of elasticity (psi) |
464,000 |
| Unit pressure @ 68F, static (psi) |
5,075 |
|
|
| Physical and Thermal Characteristics |
| Thermal conductivity |
2.45 |
| Linear thermal expansion coefficient |
11x10-5 |
| Water absorption @ 50% humidity / 72F |
0.2% |
|
|
| Electrical Characteristics |
|
| Specific volume resistance (ohm/cm) |
1015 |
| Surface resistance (ohm/cm2) |
1013 |
iglide J Running Clearance (in inches)
| Nominal ID |
Max. |
Min. |
| 0.1250 |
0.0039 |
0.0012 |
| 0.1875 |
0.0039 |
0.0012 |
| 0.2500 |
0.0048 |
0.0016 |
| 0.3125 |
0.0048 |
0.0016 |
| 0.3750 |
0.0048 |
0.0016 |
| 0.4375 |
0.0057 |
0.0020 |
| 0.5000 |
0.0057 |
0.0020 |
| 0.6250 |
0.0057 |
0.0020 |
| 0.6875 |
0.0057 |
0.0020 |
| 0.7500 |
0.0069 |
0.0025 |
| 0.8750 |
0.0069 |
0.0025 |
| 1.0000 |
0.0069 |
0.0025 |
| 1.1250 |
0.0069 |
0.0025 |
| 1.2500 |
0.0110 |
0.0032 |
| 1.3750 |
0.0110 |
0.0032 |
| 1.5000 |
0.0110 |
0.0032 |
| 1.6250 |
0.0110 |
0.0032 |
| 1.7500 |
0.0110 |
0.0032 |
| 2.0000 |
0.0110 |
0.0032 |
|
iglide J Running Clearances (in mm)
| Nominal ID |
Max. |
Min. |
| 1 mm |
.105 |
.020 |
| 1.5 mm |
.105 |
.020 |
| 2 mm |
.105 |
.020 |
| 2.5 mm |
.105 |
.020 |
| 3 mm |
.105 |
.020 |
| 4 mm |
.135 |
.030 |
| 5 mm |
.135 |
.030 |
| 6 mm |
.135 |
.030 |
| 7 mm |
.166 |
.040 |
| 8 mm |
.166 |
.040 |
| 9 mm |
.166 |
.040 |
| 10 mm |
.166 |
.040 |
| 12 mm |
.203 |
.050 |
| 14 mm |
.203 |
.050 |
| 15 mm |
.203 |
.050 |
| 16 mm |
.203 |
.050 |
| 18 mm |
.203 |
.050 |
| 20 mm |
.247 |
.065 |
| 22 mm |
.247 |
.065 |
| 24 mm |
.247 |
.065 |
| 26 mm |
.247 |
.065 |
| 28 mm |
.247 |
.065 |
| 30 mm |
.247 |
.065 |
| 32 mm |
.302 |
.080 |
|
| 
