HAHN & KOLB ZL-800 Double-Disc Lapping Fine Grinding Machine – Year 1978
For sale is a fully operational double-disc lapping / fine grinding machine originally from Hahn & Kolb (model ZL-800 series) and showing a nameplate from Aoba Seisakusho Co., Ltd. (Tokyo) with JAN 1978 manufacturing date. This machine is suited for high precision flat finishing of parts—simultaneous double-sided fine grinding or lapping—to achieve excellent surface finish and parallelism.
Key Features & Benefits:
Double-disc design allows two faces of a workpiece to be processed simultaneously (minimising warpage and setup time)
Large grinding/lapping wheels (≈ 755-810 mm diameter typical in ZL-800 series) which enable processing of sizeable flanged or flat components
Fine-grinding mode and lapping mode: wheel spacing, height settings, and transport wheel allow flexibility of process (coarse to ultra‐fine)
Heavy duty, robust construction (≈ 4.2 t machine weight in typical ZL-800) for stable precision work
Ideal for industrial finishing of castings, steel plates, tool plates, hardmetal, ceramics, etc
Fully operational—machine has been serviced/maintained (you should note condition, accessories, consumables included)
Condition & Accessories:
The machine is in working order; all major drives, discs, hydraulic units and electrical systems function correctly before disconnection.
Includes built-in transport wheel/adapter configuration, trueing/dressing device, dosing unit for lapping fluid, as per ZL-800 specifications.
The nameplate reads Fine Grinding
Please note that consumables (lapping/grinding wheels, dressing tools) are not included and will need replacement or inspection.
Buyer to arrange removal, relocation and installation (heavy duty rigging required). Rigging available with fee ($250). We have dock height and trailer height capabilities.
Specification (approximate, based on typical ZL-800 series; buyer should verify actual machine):
Lapping / grinding wheel diameter: 755-810 mm range.
Grinding ring width: 200-265 mm.
Max distance between cast-iron discs (lapping): ~125 mm.
Max distance between fine-grinding discs: ~83 / ~78 mm.
Workpiece transportation wheel diameter: ~306 mm (in one listing).
Upper/lower wheel speeds: 30, 42, 60, 84 rpm.
Transport wheel speeds: 28, 40, 56, 80 rpm.
Spindle drives: ~6 / 8 kW each (in one listing).
Total electrical load: ~11 kW (380 V / 50 Hz variant).
Machine weight: ~4,200 kg.
Table / wheel diameter in listing: 810 mm.
Year: nameplate shows JAN 1978
Manufacturer of Japanese version: Aoba Seisakusho Co., Ltd., Tokyo (per plate)
