The KRMx01 Cost Log

When I built the last CNC machine, the JGRO Router, I wasn't too good about keeping track of costs.  This time around I hope to do better.  So, as I buy materials to build the machine, I will document the cost here.  That being said, I plan to detail the actual items and amount.  I apologize now if it is too verbose.  :-)

Item Cost Notes
Books, Building the KRMx01 CNC and Upgrading and Operating the KRMx01 CNC $79.88 Ordered through Amazon.com $74.90 + $4.98 shipping.

80/20 Aluminum extrusion.  This precut kit contains:
(3) 10 Series 2040 x 56"
(1) 10 Series 2040 x 17"
(8) 10 Series 2040 x 7"

 $323.81 Ordered through Ebay link provided by Kronos Robotics.  $283.65 + $40.16 Shipping.

Fasteners (I ordered all the fasteners for the project, bolts, nuts, Washers, machine screws and the three 10' pieces of threaded rod.) All the hardware did not come in when I paid for the order.  The rest of it will be on another ticket.  I still have other hardware to buy, like bearings, shaft collars, machine bushings, etc.

(4) 3/8"-16 x 2" bolts (8) 1/4"-20 x 3/4" bolts (16) #10-24 x 1-1/4" Machine screws (16) #10 Washers
(32) 3/8"-16 x 1-1/2" bolts (41) 1/4"-20 x 5" Carriage bolts (32) 1/2" Washers (52) 3/8"-16 nuts
(2) 1/4"-20 x 3-1/2" bolts (31) 1/4"-20 x 2-1/2" Carriage bolts (120) 3/8" Washers (474) 1/4"-20 nuts
(48) 1/4-20 x 3" bolts (1) 1/4"-20 x 2" Carriage bolt (32) 3/8" Split lock washers (16) #10-24 nuts
(35) 1/4"-20 x 2-1/2" bolts (2) 1/4"-20 x 1-1/2" Carriage bolts (653) 1/4" Washers (1) 1/4"-20 x 10 feet threaded rod
(28) 1/4"-20 x 1-1/2" bolts (8) 1/4"-20 x 1" Carriage Bolts (427) 1/4" Split lock washers  
(28) 1/4"-20 x 1" bolts (156) 1/4"-20 x 3/4" Carriage Bolts (32) 3/16" Washers  
 $196.11 Bought through local Fastenal store. $178.69 + $17.42 in taxes.

Angle Iron.  All the angle needed for the project including the table.  I bought all the angle in 20' sticks because it was more than $12 per cut.  Quantity of each is in parenthesis.  The extra angle can be put to use for something.(1) 2" x 2" x 1/4"
(1) 2" x 2" x 3/16"
(3) 2" x 2" x 1/8"
(1) 1" x 1" x 1/8"

*** After examination I received (2) 2" x 2" x 3/16" angle instead of (1) 1/4" and (1) 3/16".  Other than losing a little rigidity but unlikely to affect the machine, I will use the 3/16" angle for the Y-Axis rather than going through the hassle of exchanging it.

 $195.00 Valley Steel and Welding (a local company)

 Fasteners - I received the rest of the fasteners that were missing in the initial order from Fastenal.

(2) 1/4"-20 x 10 feet threaded rod
(1) 1/4"-20 x 5" Carriage bolt
(8) 1/4"-20 x 3" Carriage bolts
(26) 1/4-20 x 4-1/2" bolt

  $36.15 Bought through local Fastenal store. $32.29 + $3.86 in taxes.
(6) Cans of Krylon Spray Paint - Cherry Red primer/paint combo, gloss.  This is for the stand and the assorted pieces of steel in the project.  $32.53 Bought from local Walmart Store.  $29.64 + $2.89 in taxes.
(40) 1/4"-20 oval nuts, Woodcraft® item number 147922 (10 pack) @ 3.99 ea.  These are used for attaching the Y-Beams to the uprights.  $23.46 Purchased from Woodcraft® website. $15.96 + $7.50 in shipping.

(1) Sheet 3/4" x 49 x 97 MDF (First layer of CNC Table) $35.72

(1) Gallon Velspar Black Gloss Paint. (To paint wood parts) $30.97

(6) 4" foam rollers. $8.98

 $83.05 Bought from Lowes Store. $75.67 + $7.38 in sales tax.

(4) Cans of Krylon Spray Paint - Cherry Red primer/paint combo, gloss.  This is for the angle pieces used throughout the machine

 $21.69 Bought from local Walmart Store.  $19.76 + $1.93 in taxes.

(3) 1-5/8" Struts.  These are the U channel struts that get bolted to the table top in which the X-Axis rails get bolted to.

 $61.54 Bought from Local Lowes store. $56.07 + $5.47 in sales tax.

(4) 0.75 x 0.75 x 0.125 - 6 feet long 6063-T52 Aluminum Angle.
(2) 0.75 x 0.75 x 0.125 - 4 feet long 6063-T52 Aluminum Angle.
This is the aluminum needed for X, Y and Z linear slides.

 $55.98 Bought from OnlineMetals.com. $28.52 for metal + $3.00 cut fee + $24.46 shipping.

(24) RM2ZZ 3/8" V-Groove bearings.  These are for the carriages.  (Please note you only need 16 for the project, but I found mine on Ebay in packs of 8.  I wanted a few extra just because you never know!  These bearings cost $5.35 each, a significant savings of the $11.00 that VXB wants on their site.)

 $128.40 Ordered from ebay. (3) packages of 8 bearings at $42.80 per pack.
(4) Cans of Krylon Spray Paint - Cherry Red primer/paint combo, gloss.  This is for the angle and other steel pieces used throughout the machine.  (up to 14 cans now.  Hindsight being what it is, it may have been better to buy a quart of paint at the automotive paint store and sprayed it with my compressor and gun!) $21.69 Bought from local Walmart Store.  $19.76 + $1.93 in taxes.
(1) Nema 24 Stepping Motor - 425 oz-in
(1) Stepping motor driver - 24-40 volts DC, up to 3.0 amps, microstepping from 1 to 1/64
(6) roller arm limit switches.

These were purchased from buildyourcnc.com.  I only ordered 1 stepper and driver because I already have 3 of these from a purchase when I updated my JGRO machine.  I intend to reuse those motors, controllers, power supply and breakout board.		 $150.18 $49.00 for Stepping motor.
$54.95 for driver
$30.00 for Switches
$16.23 for shipping

(8) DumpsterCNC Acme 1/2"-10, 5 Start Nuts Part number CRP161-00-02
(4) Oldham Zero Backlash Couplers 1/4" <=> 1/2"

These were purchased from CNCRouterParts.com.  The original nut has been replaced by the part number above.  The original nut was all plastic where this on is in an aluminum housing and should, I guess, be a little more durable.  All I really noticed was buying 8 of them was a bit pricey!!!

 $372.10

$279.60 for Acme nuts ($34.95 ea)
$86.00 for couplers ($21.50 ea)
$6.50 for shipping.

(3) Wide-Rim Zinc-Plated Steel shim, .075" thick, 1/2" ID, 7/8" OD, packs of 25
(14) One-Piece Clamp-on Shaft Collar for 1/2" Diameter, Black-Oxide Steel
(3) 1018 Carbon Steel Precicion ACME Threaded Rod, 1/2"-10 Size, 1/2" Travel/Turn, 6' long, RH Thread, 5 Starts
(1) 1018 Carbon Steel Precicion ACME Threaded Rod, 1/2"-10 Size, 1/2" Travel/Turn, 3' long, RH Thread, 5 Starts
(7) Perma-Lube Steel Ball Bearing - ABEC-1, Double Sealed, Number R8 for 1/2" Shaft Diameter, 1-1/8" OD

Ordered from McMaster-Carr.

  $388.39  $9.78 for Shims ($3.26 ea)
$28.42 for collars ($2.03 ea)
$199.50 for 6' rod ($66.50 ea)
$33.25 for 3" rod
$94.43 for bearings ($13.49 ea)
$23.01 Shipping

(1) Aluminum 6061-T651 Bare Plate 1/2" thick cut to 5" x 8.875"

Purchased from onlinemetals.com.  This was a custom cut order, and was not charged a cut fee for whatever reason.

  $26.03 $19.08 for plate
$6.95 for Shipping

(26) 1/4"-20 x 7/8 long coupling nuts

Purchased from local Fastenal

 $12.63

$11.51 for nuts (.44 ea)
$1.12 tax

(1) Hitachi Router Mount (RM-Hitachi) from K2CNC

 $82.40

$69.95 for Router mount and $12.45 shipping.

(1) Sheet 4' x 8' x 3/4" MDF.  Bought this at Lowes and will be used for the table top that sits on the struts.

 $37.22

$33.91 for MDF
$3.31 in taxes

(4) Cans Rust-o-lium Black gloss spray paint
(2) Cans Rust-o-lium spray primer

I bought this to paint the top layer of the table.  I messed up and left the gallon of paint I was using for this in my building which is unheated.  Needless to say, it ruined.

 $24.83

$22.62 for paint
$2.21 in taxes

(2) Cans of Krylon Spray Paint - Cherry Red primer/paint combo, gloss.

 $10.84

Purchased at local Walmart
$9.88 for paint
$0.96 tax

(4) 3/8-16 x 2" bolts from local Fastenal

 $2.41

$2.20 for bolts
$0.21 in taxes

(100) 1/4" split wahers
(50) 1/4-20 x 2" bolts
Purchased from local Fastenal

 $8.19

$7.46 for hardware
$0.73 in taxes

(2) 1/4-20 x 3" full thread from local fastenal

 $0.58

$0.53 for bolts
$0.05 in taxes

(70) 1/4-20 x 3/4" carriage bolts
(94) 10-24 x 1/4" machine screws
Purchased from local fastenal

 $7.13

$6.50 for hardware
$0.63 in taxes

(1) 1/8 x 2" x 36" hot rolledf steel from local D&C Auto Parts

 $7.67

$6.99 for steel
$0.68 in taxes

(2) 3/8" washers 25 pack
(1) pair 4" heavy duty corner braces(1) 3/8" lock washer 25 pack
(26) 1/4-20 x 4-1/2" full thread bolts
Purchased at The Home Depot

 $28.33

$25.93 for hardware
$2.40 in taxes

(6) push in connectors (for 14AWG wire)
(12) spade connectors
12' 14 AWG stranded wire Black
12' 14 AWG stranded wire white
12' 14 AWG stranded wire green
Purchased from local hardware store. (Midwest Supply)

 $7.45

$6.79 in materials
$0.66 in taxes

(5) 2 pin male chassis mount mic connector (GL-A286C)
(5) 2 pin femaile inline mic connector (PH-61-602B)Purchased from Vetco Electronics

 $45.75

$39.90 for connectors
$5.85 for shipping

(4) CBC4M 4 pin mic connector
(4) CBC4PX 4 pin panel mount mic connector
Purchased from CB World

 $38.95

$32.00 for connectors
$6.95 for shipping

(1) S-350-36 Power supply 36vdc 9.7a
Purchased from ebay free shipping

 $34.20

$34.20 for supply

(1) S-100-5 Power supply 5vdc 20a
Purchased from Ebay with free shipping

 $18.99

$18.99 for supply

(2) Fans, 5 VDC, 16.6 CFM, 60mm x 60mm x 15mm
Purchased from Jameco Electronics

 $14.70

$11.90 for fans
$2.80 for shipping

(1) Air exchanger for Hitachi router
Purchased from Kronos Robotics

 $103.92

$92.95 for Air Exchanger
$10.97 for S&H

(1) SuperPID for Hitachi router and computer control
Purchased from SuperPID.com

 $172.75

$155.00 for SuperPID
$17.75 for shipping

(1) Touch Plate
(1) E-Stop Switch
Purchased from cncrouterparts.com

 $119.39

$89.75 for Z Touch Plate
$15.99 for Emergency Stop
$13.65 for Shipping

(2) Solid State Relay boards
Purchased from cnc4pc.com

 $35.54

$14.00 ea. for SS Relay Boards
$7.54 for Shipping

Total cost: $3009.86