Kao Ming KMC-321HIS
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Table Size
Spindle Power
Accuracy
How much does the Kao Ming KMC-321HIS cost?
Price estimate
We do not have a price for the Kao Ming KMC-321HIS that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Kao Ming KMC-321HIS is a double-column machining center that puts a high-speed spindle on a large frame: an ISO 40 direct-drive spindle running 100 - 15,000 rpm over a 1,850 x 3,000 mm (72.83 x 118.1 in) table rated for 12,000 kg (26,400 lb). Travels are 3,230 mm (127.16 in) in X, 2,000 mm in Y and 850 mm (33.46 in) in Z, with 1,050 mm (41.33 in) of Z optional.
The standard spindle is rated 15 / 18.5 / 22 kW (20.1 / 24.8 / 29.5 hp) with 150 Nm (111 lb-ft) of maximum torque. Kao Ming then lists seven alternatives, and they are the main decision on this model. Among the direct-drive options are an ISO 50 spindle at 100-10,000 rpm with 22 / 26 / 35 kW and 222 Nm, and an ISO 40 at 100-12,000 rpm with 22 / 26 / 30 kW and 286 Nm (listed with an extra amp). The built-in options run from an ISO 40 at 100-15,000 rpm with 15 / 18.5 kW and 79 Nm to an ISO 50 at 100-10,000 rpm with 22 / 26 / 37 kW and 326 Nm.
Choosing the taper changes more than the spindle. With ISO 40 the nose-to-table distance is 150 - 1,000 mm (5.90 - 39.37 in), tools are limited to Ø75 mm (2.95 in), 300 mm (11.8 in) and 10 kg (22 lb), and the supply is 50 KVA. With ISO 50 the distance is 200 - 1,050 mm (7.87 - 41.34 in), tools can be Ø130 mm (5.11 in), 350 mm (13.77 in) and 20 kg (44 lb), and the supply rises to 60 KVA. The magazine holds 30 tools either way.
Axes run on roller-type linear guides with rapids of 20 / 20 / 15 m/min (787 / 787 / 591 ipm), and the Z axis has a hydraulic counterbalance with dual cylinders. Accuracy is listed as ±0.008 mm positioning and ±0.002 mm repeatability over full travel to JIS 6338, or P 0.025 and Ps 0.020 to VDI 3441. The machine weighs 24,500 kg (53,900 lb) and stands 4,420 mm (174.01 in) high.
Full Specifications
| Parameter | Value |
|---|---|
| X Axis Travel | 3,230 mm (127.16 in) |
| Y Axis Travel | 2,000 mm (78.84 in) |
| Z Axis Travel | 850 mm (33.46 in); opt. 1,050 mm (41.33 in) |
| Distance Between Columns | 2,100 mm (82.67 in) |
| Distance Spindle Nose to Table | ISO 40: 150 - 1,000 mm (5.90 - 39.37 in), opt. 150 - 1,200 mm (5.90 - 47.24 in); ISO 50: 200 - 1,050 mm (7.87 - 41.34 in), opt. 200 - 1,250 mm (7.87 - 49.21 in) |
| Table Size | 1,850 x 3,000 mm (72.83 x 118.1 in) |
| Max Table Load | 12,000 kg (26,400 lb) |
| Spindle Taper | ISO 40 (opt. ISO 50) |
| Max Spindle Speed | 100 - 15,000 rpm (ISO 40 direct-drive spindle) |
| Spindle Motor Power | 15 / 18.5 / 22 kW (20.1 / 24.8 / 29.5 hp) |
| Spindle Torque | 150 Nm (111 lb-ft) max. |
| Spindle Options Direct Drive | ISO 50 100-10,000 rpm, 22/26/35 kW, 222 Nm; ISO 40 100-12,000 rpm, 22/26/30 kW, 286 Nm (extra amp); ISO 40 (ISO 50) 100-12,000 rpm (10,000 rpm), 22/26/35 kW, 222 Nm (no CTS); ISO 40 100-12,000 rpm, 22/26 kW, 165 Nm (no CTS) |
| Spindle Options Built in | ISO 40 100-15,000 rpm, 15/18.5 kW, 79 Nm; ISO 40 100-12,000 rpm, 22/25 kW, 235 Nm; ISO 50 100-10,000 rpm, 22/26/37 kW, 326 Nm |
| Rapid Traverse Xyz | 20 / 20 / 15 m/min (787 / 787 / 591 ipm) |
| Cutting Feed Rate | 1 - 10,000 mm/min (0.1 - 393 ipm) |
| Tool Capacity | 30 tools (opt. 40 / 50 / 60 / 90) |
| Tool Shank | BT40 (opt. BT50) |
| Pull Stud | MAS P40T-1 (opt. MAS P50T-1) |
| Max Tool Diameter (full magazine) | ISO 40: Ø75 mm (2.95 in), Ø150 mm (5.90 in) without adjacent tools; ISO 50: Ø130 mm (5.11 in), Ø200 mm (7.87 in) without adjacent tools |
| Max Tool Length | ISO 40: 300 mm (11.8 in); ISO 50: 350 mm (13.77 in) |
| Max Tool Weight | ISO 40: 10 kg (22 lb); ISO 50: 20 kg (44 lb) |
| Power Requirement | ISO 40: 50 KVA; ISO 50: 60 KVA |
| Air Supply | 5 - 7 kg/cm² (71 - 99.4 psi) |
| Positioning Accuracy | JIS 6338: ±0.008 mm full travel (±0.0003 in); VDI 3441: P 0.025 |
| Repeatability | JIS 6338: ±0.002 mm full travel (±0.0001 in); VDI 3441: Ps 0.020 |
| Machine Height | 4,420 mm (174.01 in) |
| Machine Floor Space | 8,130 x 5,168 mm (320.1 x 201.5 in) |
| Machine Weight | 24,500 kg (53,900 lb) |
| CNC Control | FANUC 0i (31i) series; opt. Heidenhain |
| Guideways | Roller-type linear guides on three axes |
| Z Axis Counterbalance | Hydraulic, dual cylinders |
Specifications sourced from kaoming.com — verified 2026-09-25
Strengths & Limitations
Strengths
- ISO 40 direct-drive spindle at 100 - 15,000 rpm on a table rated for 12,000 kg (26,400 lb)
- Seven optional spindles, up to an ISO 50 built-in unit with 326 Nm and 22 / 26 / 37 kW
- Rapids of 20 / 20 / 15 m/min (787 / 787 / 591 ipm) on roller-type linear guides
- Optional Z travel of 1,050 mm (41.33 in) in place of the standard 850 mm (33.46 in)
- Full-travel accuracy to JIS 6338 of ±0.008 mm positioning and ±0.002 mm repeatability
- Cutting feed of 1 - 10,000 mm/min (0.1 - 393 ipm) and a hydraulic dual-cylinder Z counterbalance
Limitations
- The standard spindle gives 150 Nm (111 lb-ft) at most, light for roughing a 12,000 kg (26,400 lb) workpiece
- With ISO 40, tools are limited to Ø75 mm (2.95 in) and 10 kg (22 lb)
- ISO 50, the higher-torque spindles and the longer Z are all options, so the base machine is the high-speed version only
- The ISO 50 configuration raises the power requirement from 50 KVA to 60 KVA
Best For
Frequently Asked Questions
01
An ISO 40 direct-drive spindle running 100 - 15,000 rpm, rated 15 / 18.5 / 22 kW (20.1 / 24.8 / 29.5 hp) with 150 Nm (111 lb-ft) of maximum torque. The tool shank is BT40 with an MAS P40T-1 pull stud. ISO 50 with BT50 shanks is listed as an option.
02
Direct-drive options include ISO 50 at 100-10,000 rpm with 22 / 26 / 35 kW and 222 Nm, and ISO 40 at 100-12,000 rpm with 22 / 26 / 30 kW and 286 Nm (listed with an extra amp) or with 22 / 26 kW and 165 Nm (listed as no CTS). Built-in options are ISO 40 at 100-15,000 rpm with 15 / 18.5 kW and 79 Nm, ISO 40 at 100-12,000 rpm with 22 / 25 kW and 235 Nm, and ISO 50 at 100-10,000 rpm with 22 / 26 / 37 kW and 326 Nm.
03
With ISO 40 a tool can be Ø75 mm (2.95 in), or Ø150 mm (5.90 in) without adjacent tools, 300 mm (11.8 in) long and 10 kg (22 lb). With ISO 50 the limits are Ø130 mm (5.11 in), or Ø200 mm (7.87 in) without adjacent tools, 350 mm (13.77 in) and 20 kg (44 lb). The magazine holds 30 tools, with 40, 50, 60 or 90 as options.
04
The KMC-321SR is the torque machine of the two: it lists an ISO 50 spindle with 1,018 Nm at 4,000 rpm, 1,100 mm (43.3 in) of Z and a weight of 30,000 kg (66,000 lb). This machine runs to 15,000 rpm with 150 Nm (111 lb-ft) as standard, has 850 mm (33.46 in) of Z and weighs 24,500 kg (53,900 lb). Table load is 12,000 kg (26,400 lb) on both.
05
The power requirement is 50 KVA with an ISO 40 spindle and 60 KVA with ISO 50. Air supply is 5 - 7 kg/cm² (71 - 99.4 psi). The machine is 4,420 mm (174.01 in) high, takes 8,130 x 5,168 mm of floor and weighs 24,500 kg (53,900 lb).
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