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 [email protected] Phone: 440.234.4531 Twitter: @DW_MaryGannon
Nicole Lang igus Inc. [email protected] Phone: 401-438-2200 Twitter: @igus_Inc
Thank You q This webinar will be available at designworldonline.com & email
q Tweet with hashtag #DWwebinar
q Connect with Design World
q Discuss this on EngineeringExchange.com
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