TTC 67-420-220 40 NS TAPER SPACER TYPE MILLING MACHINE ARBOR. All products are NEVER USED but external packaging will have damage. Freeman Liquidators guarantees your satisfaction. Precision Milling Machine Arbors 30-40-50 Taper – Length of Shoulder To Nut: 20, Arbor: 41-1/4 – B20-3, 67-420-220. Hardened, ground and accurate. Arbors and spacers have standard size keyways. Has pilot with 23/32″ diameter x 1-3/4″ length. TTC 41-1/4-B20-3 40 Taper Style B Precision Milling Machine Arbor. LENGTH OF SHOULDER TO NUT.