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  • blueChick v. 4.2 CNC Machine
    Available in two sizes 1'x3' and 1'x2' routing areas.
  • Mechanics to Minimize Backlash
    Running on tensioned roller chain to eliminate backlash and small drive sprockets to increase mechanical precision.
  • Cable Carriers
    Perfectly manage the cables and hoses with these cable chains.
  • greenBull CNC Machine
    If you need BIG, we've got BIG. Available in 5 foot and 6 foot widths. Make it as long as you want!
  • Spindles and VFDs
    1.5 kW, 2.2 kW and 4.0 kW available. Also see our 1/8", 1/4" and 1/2" ER-20 Collets
  • blackTooth Laser Cutter and Engraver
    New and coming very soon, lasing all kinds of materials.

Mechanical Parts for the DIY CNC Machines

Probably the most imporatant part of the CNC Machine and the most challenging to implement. I will try to make it easy for you by offering the common component that can be used in your DIY CNC Router. These parts are especially selected to work with motors used in the DIY community and took me quite a while to find the perfect combinations. Please read the conditions of purchase prior to purchasing any products offered by BuildYourCNC.com.


Lead Screws and Anti-Backlash Nuts

With our lead screws and lead nuts, the combination is perfectly mated. CNC Machines require precise movement. Backlash occurs in many parts of the linear motion mechanics. With this lead screw and anti-backlash nut combination, you will minimize this backlash tremendously. The anti-backlash is also known as a wear compensating nut. As the machine is used over time, the lead screw may wear, and this nut will mechanically adjust for this wear. The lead screw and nut specifications: 2 turns per inch, 1/2" outside diameter lead screw, 10 threads per inch and has 5 starts (making it 2 turns per inch). The lead screw is ACME precision (same thing as saying the threads are square, not shaped like a "V"). The maximum continuous length is 77".

See instructions for this product.
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1/2" Anti-Backlash Lead Nut

$25.50
1/2" Lead Screw per inch (Steel)

$2.00

This lead screw and nut specifications: 5 turns per inch, 3/8" outside diameter lead screw, 10 threads per inch and has 2 starts (making it 5 turns per inch). The lead screw is ACME precision.

See instructions for this product.
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3/8" Anti-Backlash Lead Nut

$27.95
3/8" Lead Screw per inch (Steel)

$2.10

These parts are typically used to stabilize lead screws (so they don't move axially). Notice the open cut and the screw configuration. This is called the clamp style of collar so that there is a very tight and non-slipping condition and is made of steel. These collars will also reduce the damage on the lead screw by not using set-screws.

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1/4" Inside Diameter Collar

$6.50
3/8" Inside Diameter Collar

$6.50
1/2" Inside Diameter Collar

$7.95
5/8" Inside Diameter Collar

$7.95
7/8" Inside Diameter Collar

$8.75

Sprockets

You have a motor with a 1/2" shaft and looking for the fewest number of teeth to achieve the highest possible mechanical resolution. The sprocket has 14 teeth with .25" pitch for a total of 3.5 inches of travel in one turn of the motor. Here are the resolutions at varying microsteps (in steps per inch): Full Step - 57.143, 1/2 - 144.286, 1/4 - 228.571, 1/8 - 457.143, 1/16 - 914.286, 1/32 - 1828.571.

See instructions for this product.
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1/2" ID Drive Sprocket - 14 teeth

$11.95

You need a sprocket that connects to the motor, is small and has the fewest number of teeth possible for the best resolution. This drive sprocket has a 1/4" bore so it will fit most NEMA 23 and 24 motors. The sprocket has only 9 teeth with .25" pitch for a total of 2.25 inches of travel in one turn of the motor. That's 1422.222 steps per inch with 1/16 microstepping and the standard 200 steps per revolution.

See instructions for this product.
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1/4" ID Drive Sprocket (9 teeth)

$10.95
5/16" ID Drive Sprocket (11 Teeth)

$10.95

This is the same sprocket that guides #25 chain and drive sprocket. The sprocket has 20 teeth with a .25" pitch and contains an R6 ball bearing with a 3/8" ID (inside diameter).

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Idler Sprocket

$15.95

Notice the very large bore (hole) in the drive sprocket. That bore won't fit any motor generally used in the DIY CNC community, but accompanied with a collar that reduces the bore, now you have a great combination that fits well with 1/4" shafts. The collar has a 1/4" inside diameter and 5/8" outside diameter. The Drive sprocket has a 5/8" inside diameter with the smallest working diameter in the industry. But the collar screws stick out, you say. No worries, these screws fit right into the keyway of the drive sprocket.

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#40 Drive Sprocket

$16.95
Double Collar (Not Available)

$16.50
#40 Collar/Sprocket Combo (Not Available)

$31.95

You can use this mechanism to either help position the roller chain to assist the drive sprocket, or be used as a free wheel for one end of a loop of roller chain. This sprocket has a 5/8" inside diameter and 17 teeth and can be sold with the 5/8" bolt and nut if desired.

See instructions for this product.
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#40 Idler Sprocket (No bolt/nut)

$17.95
#40 Idler Sprocket with bolt and nut

$19.95

Here is a combination of parts to establish a drive system. Included in the kit is a Drive Sprocket, Collar, Idler Sprocket, 5/8" bolt and either a 5 foot chain or 10 foot chain or no chain so varying lengths can be purchased.

See instructions for this product.
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#40 Chain and Sprocket kit with 10 foot chain

$98.00
#40 Chain and Sprocket kit with 5 foot chain

$74.00
#40 Chain and Sprocket kit (chain purchased separately)

$50.00

Roller Chain

This is the chain that mates with the #25 sprockets. Use this chain to achieve the finest resolution roller chains can offer. The material is steel and the pitch is .25". This chain is sold by the foot. Adjust the quantity in the cart to specify the length of roller chain.

See instructions for this product.
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#25 Roller Chain (per foot)

$2.40
#25 Roller Chain Links with pencil in background for scale.

Spring type connecting link for use with single strand chain ANSI number 25. .25 inch pitch.

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#25 Roller Chain Link

$0.95

This is a single strand steel #40 chain that matches the pitch of the #40 sprockets. All links are riveted and can handle 437 pounds of working load.

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#40 Roller Chain (per foot)

$5.00
#40 Roller Chain 5 feet

$24.00
#40 Roller Chain 10 feet

$48.00
Roller Chain Link #40 shown with a pencil tip for scale.

Spring type connecting link for use with single strand chain ANSI number 40. .50 inch pitch.

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#40 Roller Chain Link

$2.75

Pulleys and Timing Belts

Single sided timing belt (belt with trapezoidal teeth) to keep a good position with linear motion applications. Urethane with Kevlar cords, pitch is .08" and the width is 1/4". This item is sold by the inch. Update the quantity with the number of inches desired.

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.08" Pitch Timing Belt 1/4" wide (per inch)


$0.50

This is an MXL size drive pulley with a .08" pitch. Connect these directly to a 1/4" motor shaft and use a .08" pitch timing belt. Maximum width belt that will fit is 1/4".

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20 Teeth .08" Pitch MXL Drive Pulley

$15.85

Single sided timing belt (belt with trapezoidal teeth) to keep a good position with linear motion applications. Urethane with Kevlar cords, pitch is .200" and the width is 3/8". This item is sold by the foot. Update the quantity with the number of feet desired.

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.2" Pitch Timing Belt (per foot)

$4.60

This is a drive pulley with a .200" pitch. Connect these directly to the motor shaft and use a .200" pitch timing belt. The bore is 1/4" with a set screw to by used with a 1/4" motor shaft.

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14 Teeth .2" Pitch Drive Pulley

$7.40

Rails

3/4 x 3/4 x 1/8 Aluminum Rails 6061

We use these aluminum rails as guide rails that the v-groove bearings ride along. The aluminum specification is 6061-T6 which is known for its structural characteristics.

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3/4 x 3/4 1/8 Aluminum Rail 6061 per foot - specify full amount needed in QTY, send email with specific cut lengths

$1.20