Linear Rails & Bearings Subset
Obsolete Page
The subsets have been replaced by kits.
Description
This subset includes linear rail pairs of different lengths from 6" to 24", as well as linear bearings.
The advantages over sliding elements are:
- Linear bearings do not bind if driven at one point
- Low friction improves the accuracy of the belt drive
- The rail is fully supported - axis can be of any length
- Rails can be used with T-slot
Disadvantages:
- Heavier weight
- Light duty since the ball bearings are side-loaded
Requires
- Basic linear motion subset
Cost
- DIY: $150 in parts and materials + shipping/taxes from 2 vendors
- Fabricated kit: tbd
Includes
fabbed items | qty |
---|---|
rail-6 channel | 2 |
rail-6 drill rod | 4 |
rail-12 channel | 2 |
rail-12 drill rod | 4 |
rail-18 channel | 2 |
rail-18 drill rod | 4 |
rail-24 channel | 2 |
rail-24 drill rod | 4 |
linear-bearing-1 half tube | 4 |
linear-bearing-2.5 half tube | 4 |
linear-bearing-3.5 half tube | 4 |
parts | qty |
---|---|
R3-2RS bearing | 32 |
screw 10-24 1/2" | 32 |
nut 10-24 | 64 |
flat screw 10-24 7/8" | 80 |
square nut 1/4 | 80 |
Assembly
Bill of materials
item | qty | unit | part# | vendor/link | notes |
---|---|---|---|---|---|
bearing R3-2RS | 4 | 10-pk | kit715 | VXB.com | |
AL tube 2x1.5x1/8 | 1 | ft | N/A | OnlineMetals.com | |
AL channel 1x0.5x1/8 | 2 | 8-ft | N/A | OnlineMetals.com | |
O1 drill rod 1/4 | 6 | 3-ft | 8893K36 | Mcmaster.com | |
screw flat 10-24 7/8" | 2 | 50-pk | 92210A246 | Mcmaster.com | |
square nut 1/4-20 | 1 | 100-pk | 94855A127 | Mcmaster.com | |
nut 10-24 | 1 | 100-pk | 90480A011 | Mcmaster.com | |
screw 10-24 1/2" | 1 | 100-pk | 91440A242 | Mcmaster.com | round combo |
Note: the BoM is arranged and the vendors are picked to minimize the total order cost. Some vendors happen to have affiliate programs in which we participate. For us this is one of the ways to raise money for the project. For you, there is no added cost. If you come across a significantly cheaper vendor, please let us know.