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igus® inc.

PO BOX 14349

East Providence

RI 02914

+1 800 521 2747
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New possibilities with plain bearings from a 3D printer

In our test laboratory, we tested the tribological behavior with reference to DIN ISO 7148-2. The series of tests covered linear, swiveling and rotary movements on different shaft materials.

Linear tests (long stroke)  

Linear test (long stroke):

Test parameter:

Surface pressure: 0.11 MPa

Surface speed: 0.34 m/s

Stroke: 370 mm

Duration: 3 weeks

Shaft materials: alu hc

Linear wear test (long stroke): v= 0.34 m/s; p= 0.11 MPa; Stroke = 0.37 m; alu hc

Linear wear test

Y= Wear rate [μm/km]
 
A. ABS (printed)   B. iglide® I180-PF (printed)   C. iglide® J (molded)

 
Linear wear test  
Test results:

The longitudinal stroke test shows that the resistance to wear of a printed iglide® I180 plain bearing is higher than a printed plain bearing made of ABS (standard material) by a factor of 15.

Gear wheels from dynamic application test

Gear wheel  

The 3D-printed gear wheel made of ABS (standard material) displays considerable wear when subjected to a torque of 1.2 Nm over an operating time of 75 h. In contrast to this, the printed iglide® I180 (B) gear wheel shows hardly any wear at all although subjected to a higher load over a longer period of time.

Linear tests (short stroke)  

Linear test (short stroke)

Test parameter:

Surface pressure: 1 MPa

Surface speed: 0,1 m/s

Stroke: 5mm

Duration: 1 week

Shaft materials: Cf53 and V2A

Linear wear test: v= 0.1 m/s; p= 1 MPa; l= 5mm

Linear wear test

Y= Wear rate [μm/km]
 
A = ABS printed   B = iglide® I180 printed   C = iglide® I170 printed   D = iglide® J260 printed   E = iglide® J260 injection-molded

 
Test results:

In the linear tests shown here, the wear rates of the printed iglide® J260 bearings (D) and the injection-molded iglide® J260 bearings (E) are the same. This shows that, in terms of resistance to wear, printed iglide® bearings are comparable to iglide® bearings that are made in the traditional way.

Swivel test  

Swivel test:

Test parameter:

Surface pressure: 1 MPa

Surface speed: 0,01 m/s

Pivot angle: 60°

Duration: 4 weeks

Shaft materials: Cf53 and V2A

Wear test, swivelling: p= 1 MPa; v= 0.01 m/s; ß= 60°

Wear test, swivelling

Y = Wear rate [µm/km]
 
A = ABS printed   B = iglide® I180 printed   C = iglide® I170 printed   D = iglide® J260 printed   E = iglide® J260 injection-molded

 
Test results:

The swivel test shows that the abrasion resistance of the iglide® filament is up to 50 times higher than the standard 3D printing materials (e.g. ABS).

Wear test, swivelling: p= 20 MPa; v= 0,01 m/s; ß= 60°

Wear test, swivelling

Y = Wear rate [µm/km]
 
A = iglide® I180 printed   B = iglide® G injection-molded   C = iglide® J injection-molded   D = iglide® L280 injection-molded   E = iglide® J260 injection-molded

 
Test results:

In this heavy-load test with a surface pressure of 20 MPa (respectively 800 kg), the resistance to wear of the printed bearings is comparable to that of the injection-molded iglide® bearings.

Friction test (rotating)  

Friction test (rotating):

Test parameter:

Surface pressure: 1MPa

Surface speed: 0,3 m/s

Duration: 2h

Shaft materials: Cf53 and V2A

Friction test, rotating: v= 0.3 m/s; p= 1 MPa; t = 2h

Coefficient of friction, rotating

Y = Coefficient of friction [MPa]
 
A = ABS printed   B = iglide® I180 printed   C = iglide® I170 printed   D = iglide® J260 printed   E = iglide® J260 injection-molded

 

This tests shows the considerably lower friction coefficients of the iglide® Tribo-Filaments compared to standard materials (ABS) for 3D printing.