Okamoto ACC-1632DX

The ACC-1632DX can grind mold base components up to 406 mm (16 in) wide and approximately 800 mm (31 in) long in a single setup. This covers the majority of injection mold base sizes used in North American plastics processing — standard mold base sizes from DME, Hasco, and Meusburger in the 300–400 mm range are well within the machine's capacity. For very large molds — automotive body panel tools and large container molds — multiple setups or a larger specialty machine is required.

The ACC-1632DX is rated for workpieces up to 250 kg (550 lb) total including magnetic chuck and fixturing. For heavy workpieces near this limit, the operator must be careful about lifting safety (crane or hoist is necessary), fixture stability on the magnetic chuck (ensure adequate magnetic holding force for the part weight and grinding forces), and thermal effects from a heavy workpiece acting as a heat sink during grinding. Okamoto's box-way design accommodates heavy tables well due to the distributed contact area of sliding ways versus linear guides.

The ACC-1632DX is not a machine commonly automated with robots due to the nature of its typical work — large, varied mold plates and dies that are too heavy and irregular for practical robot handling. Automation on this class of machine is more commonly achieved through magnetic chuck systems that allow rapid part positioning, pre-ground shims for consistent height setting, and pallet-style fixturing. Full robotic integration is technically possible but rarely cost-effective for the shop types that use this machine.

The ACC-1632DX uses grinding wheels up to 406 mm (16 in) diameter and 50 mm (2 in) wide as standard. Common wheel specifications for surface grinding hardened tool steel include 46-grit and 60-grit aluminum oxide wheels (white or pink) for most work, with 80–120 grit for finishing operations. Wheel selection depends on hardness, material, desired surface finish, and material removal rate requirements. Okamoto provides wheel specification guidance through their application support team.

All three brands — Okamoto, ELB-Schliff, and Chevalier — produce quality surface grinders in the 16-inch wide table class. Okamoto's competitive strengths are its North American service network depth and the damping characteristics of its box-way design. ELB-Schliff offers superior European engineering and their specialized grinding CNC, but thinner North American service coverage. Chevalier (Taiwanese) competes closely on price with Okamoto and has reasonable North American support. In direct technical comparison, all three are capable of 0.003 mm flatness accuracy under controlled conditions.