Hitachi Seiki CNC

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Used Hitachi Seiki CNC For Sale

Hitachi Seiki flat-bed lathes, vertical milling centers, horizontal milling centers and machining centers for sale (1985-2002 models most commonly available)

Looking for used Hitachi Seiki lathes to fit your specifications and your budget? Then look no further! CNCMachines.Net carries a Hitachi Seiki CNC’s. Our machines are ready to produce machined parts for a wide range of applications.

Hitachi Seiki History

Hitachi-Seiki was a very old Japanese company that expanded and in 1981 started making CNC turning centers in Congers, NY and later made CNC’s in Itasca, IL. Hitachi-Seiki CNC lathes and horizontal milling machines from the 1980’s to 2002 still are on the US market today. By 2001, over 4,000 units of the HT20 & HT 23J as well as the VM40J had been produced.  Like many companies, they fell victim to the early 2000 recession, and in 2002 they were acquired by Mori Seiki Kosan. Though the company that made these machines are out of business, numerous other companies still provide service, parts and retrofits for Hitachi-Seiki’s. Some machinists still like the easy interface and other functionality of this equipment.

Hitachi Seiki Controllers

Hitachi originally installed Yasnac controllers made by Yaskawa Electric. But today, some Hitachi’s are Fanuc-equipped. According to operators who know both Fanuc and Yasnac, the differences between the controllers is insignificant. The Yasnac lathe controller has its followers who like the conversational programming that became available in 2001 on the Siecos-J control. Mills with the Secios M (Yasnac I-80) are semi-conversational with a programmer’s assist. It is possible to retrofit Hitachi Seiki lathes and horizontal milling machines with new controllers from unrelated companies with good results. Many of the used Hitachi Seiki lathes have already been retrofitted with new CNC controls. Membranes on these controllers can wear out. If you are buying a Hitachi Seiki, replacement keyboard membranes can still be purchased.   

Hitachi Seiki CNC Lathes

When shopping for a used Hitachi Seiki CNC Lathe, you’ll generally find that the newer the lathe the more horsepower and spindle rpms are possible. The largest outer diameter that you will be able to turn is the chuck size, and it varies from 10” to 15” on the various models.

There are a wide range of CNC lathes available as used. Below are samples of the types of lathes that you may find for sale along with their corresponding chuck size, machine length maximum and the controller names. The HT Series (named for HiTEC) was the most popular series by the year 2001. Hitachi-Seiki’s had face-to-face index times of 0.1 sec, a unique backspin torque limiter clutch to minimize damage at mishaps, one touch full travel tailstock and 12 or 16 VDI turret’s available with and without live tools. They also had acceleration/deceleration rates of 30 m/min in the X and Z axis.

HT Series Samples of Machines Available Used

HT-25D CNC Lathe – 1988, Chuck size 10”, 3600 rpm, machine length 24”
HT-40S, CNC Lathe – 1992, Chuck size 15”, 1800 rpm, machine length 63”, Seicos A10L control
HVP23J CNC Lathe – 1994 – 2000, Chuck size 10”, (varies) 2000-4000 rpm, machine length (varies) 23.6” – 24.8”, Seicos control

HT-20SIII CNC Lathe – 1995, Chuck Size 10”

HT-23SIII CNC Lathe 1997, Chuck Size 10”, 3600 rpm, machine length 12”, Seicos L Multi CNC Control

HT-40G CNC Lathe – 1994-1997, Chuck size 15”, 2000 rpm, machine length 43”, Seicos CNC control
HT-20RIII CNC Lathe – 2001, Chuck Size 13.3”, 5000 rpm, machining length 15.7”, Seicos L Multi Seiki CNC Control
HT-30J CNC Lathe – Chuck size 15”, 2500 rpm, machine length 29”, Seicos J300L CNC control

TF-20 CNC Turning Center – 1999, SEICOS LIII Control

Vertical Milling Machines & CNC Machining Centers

Milling is a machining process of using rotary cutters to remove material from a workpiece to create a part. Vertical milling machines make smaller parts and the super-size parts are usually made on a horizonal machining center. Because of the ever-increasing complexity and features being added to both kinds of machines, both kinds may be referred to as “machining centers.” Most CNC milling machines have the ability to move the spindle along the Z-axis with allows for freedom to engrave and make much more complex parts.  When a fifth axis is added, making the machine a “5-Axis” machine, the B axis controls the tilt of the tool to make extremely complicated geometries. Most selections for CNC milling machines begin with the size parts you plan to machine.

Hitachi Seiki Vertical Milling Centers (VMC)

Hitachi Seiki produced vertical milling machines in the late from 1988 until the late 1990’s. Most available used Hitachi-Seiki VMC’s are in the “VK” series. The “MK” model appears to be one of the oldest. These vertical mills have travels that vary greatly.

Used Hitachi Seiki Vertical Milling Centers are becoming harder to find, but here are some examples of the series names, years and travels that may come available:

4MK-V Vertical Mill with 33.88” x 14” travels

VK45 VMC Vertical Milling Center, 40” x 22” x 22” travel, 20 station ATC

VK55 VMC Vertical Milling Center -1988, 4500 rpm, 40” x 22” x 20” travel

VM40II VMC Vertical Milling Center– 1996, 2000 rpm, 22” x 16” x 16” travel
VM40III VMC Vertical Milling Center – 1998, 8000 rpm, 22” x 18” x 23” travel

Hitachi Seiki Machining Center

SUPER HICELL 400 CNC Lathe and Machining Center – The last machining center made in 2002.

Hitachi Seiki Horizontal Milling Centers

The HC series by Hitachi Seiki represents their horizontal milling center lines. Samples models of used Hitachi Seiki horizontal Mills are as follows:

HC-400 – Horizontal Milling Center, 1987 20” x 18” x 18”, 6,000 rpm, 20 ATC, 40 Taper
HG-400 – Horizontal Milling Center, 1992, 22” x 23” x 20”, 12,000 rpm, 60 ATC, 40 taper

HC-500 – Horizontal Milling Center

HC-6340 – Horizontal Milling Center
HC-630 – Horizontal Milling Center, 1997 35” x 21” x 28”, 4,500 rpm, 60 ATC, 50 Taper
4MK-H – Plain horizontal mill – 1980, 48” x 10” x 18” travel, 1200 rpm

HT-G Series: HT25G, HT30G, HT40G, HT50G (were all available in 2001)
Heavy duty cutting turning centers available in block turret or with a tooling turret. Chuck sizes 10”, 12”, 15” and 18”

CS Series: CS15, CS18, CS20, CS25, CS30, CS40, CS20W, CS25W, CS20Y, CS25Y (2001)

This light-duty lathe series had chuck sizes from 6.5” (CS15) to 10” (CS25Y)

When purchasing one, some things to look for include:

  • CNC Control – Has it been updated/retrofitted?
  • Max Turning Length
  • Max Swing Over Bed
  • Turret position slots
  • Spindle Nose
  • Spindle Motor Power
  • Spindle Speed
  • X, Z Axis travel
  • Machine weight
  • Cutting Feed Rate
  • Weight of machine
  • Chip conveyor – does it come with one?

Used Hitachi Seiki Lathes Available for Sale

Hitachi Seiki also made a line of flatbed lathes in the 1980’s. Here are some samples of the model numbers and key features of the Hitachi Seiki flatbeds:

5NE-1100 CNC Flat Bed Lathe, 1985, Chuck Size 15”, Length 50”, 2500 rpm max spindle speed

7NF-1100 CNC Flat Bed Lathe, 1983, Chuck Size 26”, Length 50”, 600 rpm max spindle speed

If you are in the market for a used Hitachi Seiki lathe or horizontal milling enter, we are a leading expert in used lathes and machining centers for sale and have a wide variety of years and sizes available. We would love to help you find the perfect Hitachi Seiki machine for your shop. Contact one of our used Hitachi Seiki experts today for more details: 844.262.6789.

Visit the Hitachi Seiki website.