aggie79 wrote:Way too expensive and too precise!
Oh you are absolutely correct on both counts, aggie79. But cbrkp just asked if they work - yup they work great, and I like that particular brand.
We used them in combination with pneumatic cylinders to raise the lid on a $75,000 heat/vacuum debulking and curing table we built and sold. Our customers were curing graphite composite aircraft parts.
If you are willing to pay for linear guides, they will glide a heavy load like magic.
Silky smooth and trouble free, if you can keep them aligned truly parallel.
Back to more economical solutions for a bed, I would point to the old Shasta 1400 upper bunks that fold up against the corner of the ceiling like this.
The photo shows the upper front corner. The pin near the lamp holds up the bed in the stowed position. It lowers onto that angle bracket, the front edge of bed is permanently hinged to the front wall, with a piano hinge in the middle to allow it to fold up tight to the ceiling.