Qty. Component $/Unit Subtotal
30 V-Wheels $4.00 $120.00
60 Bearings $2.50 $150.00
35 M5 Shims $0.25 $8.75
1 2m GT2 Timing Belt $20.00 $20.00
2 4.5m GT2 Timing Belt $40.00 $80.00
3 20 Tooth GT2 Pulleys $6.00 $18.00
1 5mm to 8mm Flex Coupling $6.00 $6.00
1 8mm ACME Leadscrew $35.00 $35.00
1 Leadscrew Block $7.00 $7.00
134 TOTALS   $449.75


These polycarbonate V-wheels are precision machined to allow FarmBot to move in the X, Y, and Z directions smoothly and precisely. Each wheel requires two bearings and one precision shim to operate correctly.

Material Clear Polycarbonate
Outer Diameter 23.9mm
Inner Diameter 16mm
Width 10.23mm
Compression Strength 86 Mpa
Rockwell Hardness M 75
Price $4.00
Quantity 30


These stainless steel bearings resist corrosion and have rubber seals to keep debris out. Two of them are used in every V-wheel, and one is used to support the driveshaft in the driveshaft bearing plate.

Trade Name SS-625-2RS (SS = Stainless Steel, 625 = Bearing Size, 2RS = Two Rubber Seals)
Material Stainless Steel
Outer Diameter 16mm
Inner Diameter 5mm
Width/Thickness 5mm
Seal Rubber sealed
Price $2.50
Quantity 60

M5 Shims

These precision shims are placed in between the two bearings in every V-wheel. They keep the bearings from squishing into each other and binding when the wheel is tightened onto a plate.

Material Stainless Steel
Outer Diameter 10mm
Inner Diameter 5mm
Thickness 1mm
Price $0.25
Quantity 35

GT2 Timing Belt

Material Neoprene with Fiberglass Cords
Lengths 2m, 4.5m
Width 5mm
Thickness 0.75mm
Pitch GT2 (2mm)
Price 2m - $20.00
4.5m - $40.00
Quantity 2m - 1
4.5m - 2

2m GT2 Timing Belt

4.5m GT2 Timing Belt

GT2 Pulleys

These pulleys are attached directly to NEMA 17 stepper motor shafts or onto the driveshaft. They transfer power from the motor to the belt such that FarmBot can move in the X and Y directions.

Material Aluminum
Number of Teeth 20
Inner Diameter 5mm
Outer Diameter 15mm
Height 14mm
Setscrews Two, 1.5mm
Max Belt Width 7mm
Pitch GT2 (2mm)
Price $6.00
Quantity 3

5mm to 8mm Flex Coupling

This aluminum coupling connects the Z-axis stepper motor to the leadscrew to allow FarmBot to move in the Z direction.

Material Aluminum
Length 25mm
Outer Diameter 18mm
Inner Diameters 5mm and 8mm
Price $6.00
Quantity 1

8mm ACME Leadscrew

Material Stainless Steel
Diameter 8mm
Threads Tr8*8-2p (4 starts)
Pitch 2mm
Lead 8mm
Length 800mm (must be cut to size)
Price $35.00
Quantity 1

This stainless steel leadscrew allows FarmBot to move in the Z direction.

Leadscrew Block

This delrin block attaches to the cross-slide plate so that the leadscrew can move through it, allowing FarmBot to move in the Z direction.

Material Delrin
Threads Tr8*8-2p (4 starts)
Pitch 2mm
Lead 8mm
Mounting Holes M5, 20mm apart
Length 34mm
Width 20mm
Thickness 12mm
Price $7.00
Quantity 1