Nachi – Repair, Parts, and Overhaul | TFS Hydraulics

TFS works with Nachi products and systems

Nachi-Fujikoshi: Japanese pumps and valves for the precision industry

Nachi-Fujikoshi Corporation is a Japanese multinational founded in 1928 in Toyama, now listed on the Tokyo Stock Exchange with over 9,000 employees and five operating divisions: bearings, cutting tools, hydraulics, industrial robotics, and special materials. Nachi’s Hydraulics division specializes in vane pumps, piston pumps, directional valves, proportional valves, and CETOP solenoid valves for industrial applications, hydraulic presses, and machine tools.

Nachi’s portfolio relevant to the Italian market includes the VDR and VDS series variable-displacement vane pumps (displacement 8–150 cm³/rev, pressure 70–210 bar), the PVS and PZS series of high-pressure axial piston pumps, the SA, SS, and SL series of directional valves in CETOP/ISO 4401 standard, proportional solenoid valves for flow and pressure control, and servo controls. Widespread use in injection molding machines, Japanese machine tools (Mazak, Okuma, Mori Seiki), and industrial systems installed in Italy.

TFS Services for the Nachi Brand

TFS Oleodinamica, a Bosch Rexroth Certified Excellence Service Partner since 1997, is a service center for Nachi pumps and valves installed on industrial presses, machine tools, and systems.

• Repair of VDR/VDS vane pumps with replacement of cartridges, shafts, seals, and recalibration of maximum pressure on the TFS test bench.
• Overhaul of PVS/PZS piston pumps with replacement of cylinder blocks, distributors, swash plates, and pressure testing.
• Functional testing of CETOP SA/SS/SL series valves and recalibration of proportional valves using TFS instrumentation.
• Nachi ↔ Bosch Rexroth/Atos/Yuken cross-reference: replacement of Nachi CETOP valves with equivalent Bosch Rexroth WMM/WEH valves while maintaining ISO 4401 pinout, particularly useful on historic Japanese machine tools.
• Vane pumps: cross-reference with Casappa or Vickers V20 for stationary industrial applications where Nachi replacement parts have long lead times from Asia.
• Integration into custom control units for injection molding machines and machine tools with Bosch Rexroth valves, ARGO-HYTOS or MP Filtri filters, and Emmegi heat exchangers.
• National and international coverage – expertise in the plastic molding and machine tool sectors in Italy.

Do you have a Japanese injection molding machine or machine tool with a faulty Nachi VDR/VDS pump, PVS pump, or CETOP valve? Do you need a cross-reference to an alternative brand? Contact the TFS technical team – we handle repairs, spare parts, and cross-references throughout Italy.