- Power and phase
- The 1976 260-D has two 5 HP three-phase motors at 230 or 460 V, one on each arbor, and the 1942 sheet offered two- or three-phase. On house power you'd need a rotary phase converter big enough for a 5 HP motor or a VFD on each motor. Read both motor plates before anything else.
- Motor and bearings
- Each saw has its own motor built onto the arbor, and you swing the yoke with a handwheel to bring the rip or crosscut blade up. Ask for a video of the yoke swinging and each motor running. The interlock should let only the upper motor start.
- Runout
- Both arbors are 1 in where the saw mounts and run in ball bearings. Ask the seller to spin each blade by hand with the power off and watch the rim. A dial indicator on each flange is the real test.
- Table and rust
- The table is 41-1/2 x 44-1/2 in, part fixed and part rolling on ball-bearing ways. Ask for a photo of the rolling section moving. It should roll smoothly and sit level with the fixed table.
- Fence, guards and gauges
- Oliver fitted an automatic saw guard as standard and a Type E ripping fence. Check the photos for both. Oliver fences and guards are specialist items now.
- Trunnions and adjustments
- The 1976 saw has an electric brake, and pressing stop makes a solenoid apply it. Ask the seller to show the saw stopping. It should stop quickly rather than coast for a long time.
- Blades and knives
- It runs two 16 in blades, a rip and a combination, on 1 in arbors, and takes 18 in saws too. Blades this size are industrial stock, so check what's on it.
- Dating it
- Oliver used one serial sequence for every machine from 1907. On VintageMachinery.org's table, 74,000 falls around February 1950, 202,000 around May 1972 and 207,600 around February 1989.
- Moving it
- It weighs about 2,500 lb. That means a forklift, a drop-deck trailer or a professional rigger, and it may be over a freight liftgate's limit. Measure your door and floor before you buy.
- Safety upgrades
- Controls are magnetic with overload and undervoltage protection, so check they work and the saw won't restart on its own after a power cut. The guard should be there and working.
Check the listing photos against these lists, and ask the seller about anything you can’t see. A missing fence, guard or motor should come off the price.