I have an exercycle that I still use occasionally after 20 years, more so recently to strengthen my spindly legs. I find the wide seat uncomfortable and want to replace it with a bicycle seat which though narrower is better suited to my anatomy. As the seat height adjustor is topped with a 1/8" plate welded to it I have to adapt it to a bicycle seat post by drilling an appropriate sized hole, approximately 25.4 mm-28 mm in diameter. The bicycle seat tube topped with the bike saddle can then be adjusted in height using the exercycle seat height adjustor. Drilling was difficult. Though I hoped to complete it with a step drill bit, my progress to just 3/8" using a hand held power drill with a twist bit has been slow (1/8-1/4-3/8 so far) and the bit has bound several times. I am certain I can't get far with the step bit which I am trying to cancel from Amazon and which I should not have ordered before my test drilling.
I have only a woodworkers' drill press, no drill press vise, and no way of securing the relatively heavy seat height adjustor to the drill press table. I am reconciled to the present seat but if someone has a pertinent suggestion I would be delighted. The bloody knuckle occurred from a scrape not related to the drilling but I included it as click-bait.
rsz_a77df138-6670-4942-8896-4ef350d2b855_1_201_a.jpg
.