| Part Number | Description | Quantity | Function | Material | Manufacturing | Mass (g) | Picture
|
| 001
| Screw | 15 | Hold case together, hold bracket down | Steel | Standard item | 1 |
|
| 002
| Housing Right Side | 1 | Protect motor | Plastic | Injection Molded | 546 |
|
| 003
| Housing Left Side | 1 | Protect motor | Plastic | Injection Molded | 534 |
|
| 004
| Mulcher/Fan blade guard | 1 | Protect user from blade | Plastic | Injection Molded | 204 |
|
| 005
| Chute Locking Tab | 1 | Hold chute on housing | Plastic | Injection Molded | 14 |
|
| 006
| Bottom Attachments Release Tab | 1 | Release bottom attachments for removal | Plastic | Injection Molded | 13 |
|
| 007
| Chute Locking Tab Spring | 1 | Hold Chute locking tab in place | Steel | Drawn | 13 |
|
| 008
| Torsion bar for heal release | 1 | Holds heel release in place and allows for unlocking | Steel | Bent | 13 |
|
| 009
| Bottom Attachment Interlock Trigger | 1 | Depresses contact for bottom safety interlock | Plastic | Injection Molded | 10 |
|
| 010
| Spring for interlock trip | 1 | Holds trigger in off position when attachment is not installed | Steel | Drawn | 1 |
|
| 011
| Heel Attachment Safety Switch Assembly | 1 | Allows operation only when bottom attachment/guard is installed | Plastic, Steel, Copper | Injection molding, stamping | 1 |
|
| 012
| Wire Bracket | 1 | Holds wires in place | Steel | Stamped | 6 |
|
| 013
| Male Connector | 3 | Connects components in electrical circuit | Steel | Punched | N/A |
|
| 014
| Male Connector Insulator | 2 | Protects connections from contacting other electrical components | Plastic | Injection Molded | 1 |
|
| 015
| Female Connector | 3 | Connects components in electrical circuit | Steel | Punched | N/A |
|
| 016
| Female Connector Insulator | 2 | Protects connections from contacting other electrical components | Plastic | Injection Molded | 1 |
|
| 017
| Power Cable Rubber Grommet | 1 | Adds flexibility to power connection | Rubber | Injection Molded | 8 |
|
| 018
| Power Cable | 1 | Connects motor to power source | Copper, rubber, plastic | Pre-assembled component | 74 |
|
| 019
| Soft connector isolator | 2 | Protections connections from contacting other electrical components | Plastic | Molded | 1 |
|
| 020
| Selector Switch Insulation/Mount | 1 | Holds selector switch contacts in place | Plastic | Injection Molded | 2 |
|
| 021
| Selector Knob Slider | 1 | Slides when knob is turned to turn blower to OFF/I/II | Plastic | Injection Molded | 2 |
|
| 022
| Switch Contactor | 1 | Contacts appropriate output contact to close circuit when blower is on and select speed | Steel | Stamped | 1 |
|
| 023
| Contactor from safety interlock | 1 | Closes circuit to switch when bottom attachment is secure | Steel | Stamped | 1 |
|
| 024
| Contactor for High Power | 1 | Connects circuit in high power orientation | Steel | Stamped | |
|
| 025
| Contactor for Low Power | 1 | Connects circuit in low power orientation | Steel | Stamped | 1 |
|
| 026
| Diode | 1 | Prevents current from alternating to provide low power mode | Various | Purchased Component | 1 |
|
| 027
| Knob | 1 | Allows user to turn blower on and switch between low and high power mode | Plastic | Injection Molded | XX |
|
| 028
| Selector Housing | 1 | Holds selector switch connectors and slider in place and attaches to knob | Plastic | Injection Molded | N/A |
|
| 029
| Pin | 2 | Attaches knob to selector housing | Steel | Pulled | N/A |
|
| 030
| Fan/Mulcher Blade | 1 | Draws air into blower to be blown out and mulches leaves in vacuum mode | Aluminum | Cast | 322 |
|
| 031
| Blade Spacer | 1 | Separates blade from motor housing in order to prevent incidental contact | Plastic | Injection Molding | 16 |
|
| 032
| Blade nut | 1 | Holds blade and blade spacer on shaft, left handed to prevent loosening | Plastic | Injection Molded | 7 |
|
| 033
| Bearing mount | 1 | Holds shaft bearing in place | Steel | Stamped | 56 |
|
| 034
| Wire Contact Spring | 1 | Holds wires in place and provides contact across motor coils | Steel | Drawn | 1 |
|
| 035
| 20 A Fuse | 1 | Protects motor from overload | Various | Standard Component | 6 |
|
| 036
| Fuse Insulation | 1 | Protects fuse from contact with other electrical components | Plastic | Purchased (tube) | N/A |
|
| 037
| Motor Assembly | 1 | Drives shaft to rotate fan | Various | Standard Component | 619 |
|
| 038
| Motor Magnet and outer coil | 1 | Provides magnetic field to drive motor | Various | Standard Component | 946 |
|
| 039
| Zip Tie | 6 | Holds components (wires, bag) in place | Plastic | Standard Component | N/A |
|
| 040
| Blower Chute Attachment | 1 | Directs air from fan to blower extension | Plastic | Injection Molded | 128 |
|
| 041
| Blower Chute Midsection | 1 | Extends blower chute from attachment to tip | Plastic | Injection Molded | 97 |
|
| 042
| Blower Chute Air Concentrator | 1 | Concentrates air leaving blower | Plastic | Injection Molded | 48 |
|
| 043
| Blower Chute Oscillating Head Tip | 1 | Swivels under air pressure to allow air to be blown in a multiple directions for wider path | Plastic | Injection Molded | 18 |
|
| 044
| Blower Chute Oscillating Head Connector | 1 | Links oscillating tip to connection to chute midsection | Plastic | Injection Molded | 17 |
|
| 045
| Oscillating Tip Connection to Chute Midsection | 1 | Connects oscillating tip to chute midsection | Plastic | Injection Molded | 44 |
|
| 046
| Vacuum Tube, Fan End | 1 | Connects to bottom of motor housing for vacuum use | Plastic | Injection Molded | N/A |
|
| 047
| Vacuum Tube Bottom | 1 | Connects to fan end to suck leaves into mulcher | Plastic | Injection Molded | 1031 |
|
| 048
| Leaf Bag | 1 | Collects debris when used in vacuum configuration | Nylon | Sewn | 245 |
|
| 049
| Bag/Chute Connector | 1 | Connects leaf bag to blower outlet | Plastic | Injection Molded | 71 |
|
Considering ways in which a product could potentially fail is a crucial part of the design process. All products must be designed such that they are both safe and reliable for use and any potential dangers must be addressed in the design phase. The table below shows the primary ways in which the leaf blower studied for this report could potentially fail as well as the probable consequences, severity, causes, likelihood of occurrence, design safeguards, detectability of failure, recommendations for improvement and responsibility for making changes. The values assigned for severity, likelihood of occurrence and detectability (S, O, and D respectively) are based on the tables found in Dieter and Schmidt's 'Engineering Design'. The risk priority number (RPN) is simply the product of these numbers and can be used to assign a priority to potential failures in order to organize the redesign process.
