KraftTech Power Sander

Figure 1: KraftTech Power Sander

Group

Christopher Shake

Mark Steinhauer

Joseph Valickus

Description

The KraftTech Power Sander is a light duty orbital sander. It is used to sand small to medium sized wooden items and accepts various grits of sandpaper. The sanding pad oscillates in a small circle, constantly moving even when the user isn't, allowing for much faster sanding than with just paper.

Specifications

This sander was most likely designed to meet these customer specifications:

• Fast sanding
  • Able to remove material quickly
• Comfortable to hold
  • Doesn't hurt to use even with constant vibration against hand
• Removes dust from surface
  • Reduces possible particulate in air
• AC Power Connection
  • Can be plugged into wall outlet instead of battery

In addition to customer requests, engineering specifications might have also been provided:

• Accepts 60Hz 120VAC
  • Runs on standard wall current
• Uses standard 1/4 sheets of sandpaper
  • Won't require hard to find consumables
• Minimal internal losses
  • More efficient power usage - correlates to Fast Sanding
• Minimal vibration felt by user
  • Similar to Comfortable to hold, this also is a part of mechanical efficiency by requiring that more power go to the movement of the sanding plate than the user

Parts

List of parts:

Table 1: Power Sander Component List

Part #	Part Name	Category	Function	Material	Picture	Model
1	Power Cord	Input	Provides power to the Power Sander	Insulated Wires
2	Switch	Input	Allows user to toggle power on and off	Plastic with metal contacts
3	Feathers	Input	Provides power to the motor	Carbon
4	Motor	Input	Spins the driveshaft	Copper, Steel
5	Sanding Platform	Output	Performs the base for the sanding function of the tool	Plastic/rubber
6	Fan	Output	Moves dust from surface into the dust collector, cools the motor	Plastic
7	Dust Director	Output	Directs the dust into the dust collector	Plastic
8	Offset Weight	Motor Conversion	Provides vibration and non-uniform motion within Power Sander	Steel
9	Bearings	Support Element	Allow smooth, rotational motion	Steel
10	Flexible Legs	Structural Component	Attaches the Sanding Platform to the body while letting it move a small amount	ABS Plastic
11	Casing	Structural Component	Shields the user from electrical contact, gives the device its shape, provides support to the entire tool	ABS Plastic
12	Sandpaper Clips	Other Components	Hold the sandpaper in place	Steel

Table 2.1: Part1

1	What Decisions were made in the design of this component/module?	info
2	What are the critical features and dimensions?	info
3	What kind of loading do we expect to be on the component?	info
4	What measures can we use to evaluate performance?	info

Links

Bucknell Mechanical Design

KraftTech Power Tools Website