Materials Selection
The current material used for Fillauer’s King Pin Lock was also suggested by Fillauer as the new design’s material. Based on this material, research and calculations were made to validate its integrity. 17-4 Stainless Steel HT 1150°F is used for both the housing and hub. 17-4 stainless steel is used throughout industrial and mechanical fields for its high strength, toughness, and low cost. It is also easily cast and machined allowing for easy manufacturability and multiple uses. The housing will be cast and machined, while the gear hub will be completely machined, similar to Fillauer’s current fabrication process.
Figure 4.4.1 Material Properties for AK Steel Precipitation Hardening Stainless Steel 17-4 PH, Condition H 1150
Materials/Cost Analysis
|
Part Number |
Description |
Unit Price |
Total Price |
Knee Joint Part |
|
87205K141 |
Type 17-4 PH Hardened Stainless Steel Rod 1-1/8" Diameter, 1" Length (Same as 87205K14) |
$34.89 Each |
$34.89 |
Ratchet Gear 1" Diameter 0.36" Length |
|
89095K323 |
Type 416 Stainless Steel Rod 1-1/2" Diameter, 1" Length (Same as 89095K32) |
$41.19 Each |
$41.19 |
Ratchet Gear Backing 1-1/2" Diameter 0.0625" Length |
|
88955K252 |
Type 416 Steel Precision Ground Rod ¼" Diameter, 3’ Length (Same as 88955K25) |
$14.19 Each |
$14.19 |
Pawl 0.25" Diameter 1.24" Length |
|
8546K27 |
Virgin Electrical Grade Rod of Teflon PTFE 1-3/8" Diameter |
$30.33 Each |
$30.33 |
Bearing 1.34" Diameter |
|
98380A471 |
Type 416 Ss Dowel Pin 1/8" Diameter, ½" Length, MIL Spec 16555-627, Packs of 50 |
$10.46 Each |
$10.46 |
Pins 1/8" Diameter ½" Length |