Model 535 Threading Machine, NPT, 1 8 in to 2 in Pipe Capacity, 115 V AC, 15 A, 36 RPM' no checkout Good chemical Good chemical Their rugged motors are explosion proof and rain proof to ensure a long life of dependability Heavy duty cast iron construction Carbon vanes and ceramic carbon seals reduce wear and repair expense Integral check valve with pressure relief on outlet side reduces pressure drop and improves vertical lift Self priming Large chip tray and oil reservoir makes the 535 ideal for longer uninterrupted threading Generous top cover for keeping tools and fittings handy High clearance carriage makes threading easier Speed Chuck™