The Robits Cog Drive Kit is a straightforward method for adding linear motion to your projects. Description What's in the Box? Documentation This kit uses the same concept as a rack and pinion system to turn a rotary action into a linear one. The cog teeth interface with the holes in the tube to create a reliable power transfer that is both simple and effective. This kit can be configured in multiple ways utilizing either a servo or a motor for extension and retraction. Using the included bushing, this kit can be paired up with multiple Cog Drive Kits and powered from the same shaft. **Note** The following components are NOT included with this kit. 2 - 0.5 x 0.5 Robits Tubes 1 - NeveRest Orbital Motor 1 - 6mm D to 375IN Hex Adapter (am-3444) 1 - 5 Turn Programmable Servo 1 - 5mm Hex to 375IN Hex Adapter (am-4957-0100) Included Items: 1 - Robits Cog Drive Servo Bracket (am-5041) 2 - 10-32 x 0.5 in. Socket Head Cap Screw (am-1002) 2 - 10-32 x 1 in. Socket Head Cap Screw (am-1056) 2 - 10-32 x 1.25 in. Socket Head Cap Screw (am-1041) 8 - 10-32 x 1.5 in. Socket Head Cap Screw (am-1014) 12 - 10-32 Nylock Jam Nut (am-1063) 4 - 2 x 4 Robits Plate Gusset (am-5006_2x4) 8 - #10 Flat Washer (am-1026) 8 - 5 mm ID 13 mm OD Shielded Bearing (695ZZ) (am-4724) 2 - 0.194 in. ID x 0.375 in. OD x 0.125 in. Long Nylon Spacer (am-1732) 6 - 0.194 in. ID x 0.375 in. OD x 0.250 in. Long Nylon Spacer (am-1700) 1 - 0.425 in. ID x 0.688 in. OD Robits Flanged Bushing for 0.375 in. Hex Shaft (am-5021) 1 - Robits 7 Tooth 3/8 Hex Bore Cog (am-5472) 1 - 80T or 100T Motor Mount Robits Mounting Bracket (am-5017) 1 - 0.430 in. ID 0.500 in. OD 0.500 in. Long Aluminum Spacer (am-1699) 3 - M3-0.5 x 8 mm Socket Head Cap Screw with Thread Patch (am-1500)