Engineered plastic bearings for automotive applications

q  This webinar will be available afterwards at www.designworldonline.com & email

q  Q&A at the end of the presentation q  Hashtag for this webinar: #DWwebinar

Before We Start

Moderator Presenters

Mary Gannon Design World

Nicole Lang igus Inc.

•  Make up and capabilities of engineered plastic bearings

•  Automotive application requirements and material specifications

•  Material selection process for automotive applications

This webinar will cover:

Engineered plastic bearings for automotive applications

•  igus® – 50+ years of polymer research and development

•  Range of plastic bearings, linear bearings and guides, cable carriers, flexible cables

•  Millions of “iglide®” bearings used by automotive OEM’s each year

•  Recyclable, meet ELV regulations

•  Made of composite polymers for high strength/wear resistance

•  Simple Polymers:

u  Soft; weak when put against loads

u  Have low COF (typically ≤.1)

u  High wear rates

u  Low melt temperature

Material Overview

[image  credit:  Stachowiak  &  Batchelor,,  Engineering  Tribology,  2005,   3rd  Ed,  Elsevier  Inc.,  Chp.  16,  Figs.  16.7,  16.9,  and  16.26,  pp.  657-­‐‑672.]

•  Composite Polymers:

u  Improved mechanical strength

u  Improved wear-resistance

u  Reduced COF

u  Moldable, machinable

Material Overview

[image  credit:  Stachowiak  &  Batchelor,,  Engineering  Tribology,  2005,   3rd  Ed,  Elsevier  Inc.,  Chp.  16,  Figs.  16.7,  16.9,  and  16.26,  pp.  657-­‐‑672.]

Material Overview

friction wear

Parameters: P = 0.7 N/mm2, v = 0.15 m/s, case-hardened steel shaft

Simple vs. Composite polymers

•  Traditional bearing solution

u  Metallic shell with lubricating layer

u  Inside layer subject to destruction

u  COF maintained only through internal layer thickness

Material Overview

Material Overview

PTFE lined metal backed bearing vs. composite polymer bearing

Material Overview

PTFE lined metal backed bearing vs. composite polymer bearing

Material Overview

PTFE lined metal backed bearing vs. composite polymer bearing

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Alu hc Cf53 St37 V2A

igus J

igus L280

igus Z

DU

Parameters: Pressure = 1 MPa, Velocity = 0,01 m/s

•  Have high wear resistance

•  Require little maintenance

•  Provide thermal stability

•  Resist corrosion

To succeed in automotive applications, plastic bearings must:

•  More than 5,000 individual experiments each year

•  Industry’s largest test lab

•  All results compiled into massive database

•  Customized testing possible

igus Test Lab

Automotive applications utilizing plastic bearings Lower stress

Automotive applications utilizing plastic bearings Lower stress

Automotive applications utilizing plastic bearings Lower-Medium stress

Automotive applications utilizing plastic bearings Lower-Medium stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Medium Stress

Automotive applications utilizing plastic bearings Heavy Stress

Automotive applications utilizing plastic bearings Heavy Stress

Automotive applications utilizing plastic bearings Heavy Stress

Automotive applications utilizing plastic bearings Heavy Stress

Material Selection

Selection criteria should include: •  Temperature

•  Static surface pressure

•  Counter-face roughness

•  Speed

•  Wear factor (k)

•  Max PV value

Material Selection

PV value is the most critical factor when specifying a plastic bearing PV value: friction heat created when the shaft moves inside the bearing = pressure x speed

Via the bearing into the housing

Via the shaft outside the bearing

Material Selection

High pressure materials

High Temperature materials

Material Selection

Conductive materials for e-coating

Material Selection

•  iglide Product Selector

•  dry-tech Sample Box

•  www.igus.com/iglide

Questions? Mary Gannon Design World mgannon@wtwhmedia.com Phone: 440.234.4531 Twitter: @DW_MaryGannon

Nicole Lang igus Inc. nlang@igus.com Phone: 401-438-2200 Twitter: @igus_Inc

Thank You q  This webinar will be available at designworldonline.com & email

q  Tweet with hashtag #DWwebinar

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