Akira Seiki H250RT
Image: akiraseiki.com, Akira Seiki
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Table Size
Spindle Power
y axis travel
How much does the Akira Seiki H250RT cost?
Price estimate
We do not have a price for the Akira Seiki H250RT 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
Akira Seiki describes the H250RT as a compact horizontal machine with a 250 mm table for four- and five-axis work. In place of the twin pallets of the H3XP it carries a ∅250 mm (∅9.8 in) rotary table that swings on B over -30°~ +120° and rotates 360° on C.
The idea is to finish a small part on all its faces in one clamping, on a horizontal spindle where chips fall clear. Y and Z travels are 400 mm (15.7 in) and 350 mm (13.8 in), and the spindle nose to table distance is 150~500 mm (5.91~19.69 in). The B axis indexes to 0.001°.
Three rows of the maker's table for this model are not shown on this page, because the metric and inch figures printed in them disagree: X travel, table load and tool weight. Confirm all three with Akira Seiki before planning a job around the machine.
The rest of the specification follows the H3XP. The BT40 spindle is belt driven, 12,000 rpm, 17.7 HP (13.2 kW) peak, with coolant through the spindle as standard. Rapids are 48 / 48 / 48 m/min (1,890 / 1,890 / 1,890 ipm), the magazine is 36T (60T optional) and the tool change is 1.6 s. The H250RT weighs 5,750 kg (12,677 lb) and measures 3,260 x 5,075 mm (128 x 199 in).
Full Specifications
| Parameter | Value |
|---|---|
| Y Axis Travel | 400 mm (15.7 in) |
| Z Axis Travel | 350 mm (13.8 in) |
| C Axis Range | 360° |
| B Axis Range | -30°~ +120° |
| Distance Spindle Nose to Table | 150~500 mm (5.91~19.69 in) |
| Table Size | ∅250 mm (∅9.8 in) |
| B Axis Indexing | 0.001° |
| Spindle Motor Power | 17.7 HP (13.2 kW) |
| Max Spindle Speed | 12,000 rpm |
| Spindle Drive | Belt Type |
| Spindle Taper | BT40 |
| Coolant Through Spindle | Standard |
| Rapid Traverse Xyz | 48 / 48 / 48 m/min (1,890 / 1,890 / 1,890 ipm) |
| Cutting Feed Rate | 12 / 12 / 12 m/min (472 / 472 / 472 ipm) |
| Tool Capacity | 36T / 60T (OPT) |
| Max Tool Diameter (full magazine) | ∅65 mm (2.6 in) |
| Max Tool Diameter Without Adjacent Tools | ∅130 mm (5.1 in) |
| Max Tool Length | 200 mm (7.87 in) |
| Tool Change Time | 1.6 s |
| Coolant Tank Capacity | 200 L (52.8 gal) |
| Air Pressure Requirement | 0.5 MPa (72.5 psi) |
| Power Requirement | 35 kVA |
| Machine Dimensions | 3,260 x 5,075 mm (128 x 199 in) |
| Machine Weight | 5,750 kg (12,677 lb) |
Specifications sourced from akiraseiki.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Tilting rotary table: B swing of -30°~ +120° and 360° on C
- Horizontal spindle, so chips fall away from the part
- 48 / 48 / 48 m/min (1,890 / 1,890 / 1,890 ipm) rapids, 1.6 s tool change
- Coolant through the spindle as standard, 36T or optional 60T
Limitations
- The table is only ∅250 mm (∅9.8 in)
- No pallet changer, unlike the H3XP
- X travel, table load and tool weight could not be taken from the maker's page
- 17.7 HP (13.2 kW) peak spindle power
Best For
Frequently Asked Questions
01
It has three linear axes plus a table that swings on B over -30°~ +120° and rotates 360° on C. The maker calls it a 250 mm 4 / 5 axis machine; whether the axes interpolate simultaneously is not stated in the table.
02
It is not shown here. The maker prints a millimetre and an inch figure for X that do not match, so the row was left out. Y travel is 400 mm (15.7 in) and Z travel 350 mm (13.8 in).
03
The H3XP has two 320 x 320 mm (12.6 x 12.6 in) pallets and an 8 s pallet change. The H250RT has a single tilting rotary table and no pallet changer. Spindle, rapids and magazine are common to both.
04
A belt-type BT40 spindle at 12,000 rpm with 17.7 HP (13.2 kW) peak. The magazine holds 36T, or 60T as an option, with tools up to ∅65 mm (2.6 in) and 200 mm (7.87 in) long.
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