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Bill of Materials
Many of you have asked me to provide a list of materials and costs for the CNC Machine. Here, I will provide a list of the materials, costs and where they can be purchased. In the list, I will also include various alternatives for different types of applications. This may include types of cutting tools, types of motors for the axes, etc. I will keep this list alive and updated in the "stuff for sale" in lieu of a better place. Please write me with suggestions, and if you know of better prices and places to get these materials. This list is a work in progress, since I wanted to make it available immediately. Most prices are from memory, until I find my receipts somewhere in one of my packing boxes, so you may see numbers change, but it gives you a general idea.

CNC Machine Structure
DescriptionUnit CostQtyCostUpgrade Cost
MDF 2' x 4' x 3/4"$9.003 Sheets$27.00$27.00
Aluminum Angle 3/4" x 1/8"$1.50/lf8$12.00$12.00
Bearings (for sale here)30 Pack$24.00$24.00
Bolts 5/16" - 18 x 3/4" L (for slide bearings).1724$4.08$4.08
Nuts 5/16" - 18 (Box of 100)100$7.00$7.00
Screws 1/4" - 20 (Box of 50)50$6.00$6.00
Nuts 1/4"100$3.50
Cross Dowel Nuts (for sale here) 60 $28.00
Couplers (1/4" bore - 2 hubs and an insert)$8.003$22.50$22.50
Aluminum Angle 1 - 1/4" x 1/8" 8'$20.00$20.00
  Sub Total $127.88$152.08

CNC Electronics
DescriptionUnit CostQtyCostUpgrade Cost
Driver Board L298 L297 Combo (Very inexpensive alternative and Total DIY)$16.003$48.00
Driver Board (HobbyCNC 3 Axis)$79.001$79.00
Power Supply Components:
Transformer - 24Volt 10Amps$39.001$39.00$39.00
Bridge Rectifier$4.001$4.00$4.00
Capacitor (Min 14000 uF)$20.001$20.00$20.00
NEMA 23 80 oz-in (surplus)$10.003$30.00
NEMA 23 305 oz-in$45.003$135.00
Cables contingency$100.001$100.00$100.00
Cutting Tool: 




Router $100$100.00 $300.00 
Sub Total$341.00$677.00
Computer (Quad core)   Priceless!