Hurco HBMx55i

$350,000 - $475,000 Updated 2025-03-15

Key Specifications

X Travel

1,400 mm (55.1 in)

Y Travel

1,100 mm (43.3 in)

Z Travel

900 mm (35.4 in)

Max Spindle

3,000 RPM

Spindle Taper

BT50 / ISO50

Tool Capacity

Overview

The Hurco HBMx55i is the entry point in Hurco's horizontal boring mill lineup, designed for shops that need to machine large, heavy workpieces on multiple faces without refixturing. As a table-type horizontal boring mill with a 55 kW (74 hp) spindle, BT50 taper, and generous axis travels, it handles the heavy boring, milling, and drilling operations that vertical machines simply cannot reach.

The horizontal spindle runs to 3,000 RPM with 55 kW (74 hp) and a BT50 taper, providing the rigidity and power needed for large boring bars, face mills, and heavy-duty end mills. The W-axis quill extends 500 mm (19.7 in) from the spindle face, reaching deep into workpieces for boring operations that would be impossible on a VMC. This quill travel is what makes a boring mill a boring mill — the ability to reach inside large castings, housings, and structural components.

The table is 1,400 x 1,200 mm (55.1 x 47.2 in) with a built-in rotary B-axis that indexes the workpiece for multi-face machining. X-axis travel is 1,400 mm (55.1 in), Y-axis is 1,100 mm (43.3 in), and Z-axis is 900 mm (35.4 in). Combined with the W-axis quill and B-axis table rotation, you can machine all four sides plus the top of a workpiece in a single setup.

The 40-tool automatic tool changer provides enough capacity for complex jobs with many tool changes. Table load capacity is approximately 4,000 kg (8,818 lb), accommodating heavy castings and weldments. Rapid traverse runs at 20 m/min on linear axes.

The WinMax conversational control is a significant advantage on a boring mill, where programming large parts with multiple faces and deep features can be extremely time-consuming. Most boring mills run with FANUC or Siemens controls that require G-code programming. WinMax lets operators approach these same parts conversationally, which saves hours on complex setups. The HBMx55i competes with the Kuraki KBT-11A, Doosan DBC 130, and similar horizontal boring mills.

Full Specifications

Parameter	Value
Table Size	44.1 x 49.2 in (1,120 x 1,250 mm)
X-Axis Travel	1,400 mm (55.1 in)
Y-Axis Travel	1,100 mm (43.3 in)
Z-Axis Travel	900 mm (35.4 in)
Travel W	500 mm (19.7 in) quill
Max Spindle Speed	3,000 RPM
Spindle Motor Power	55 kW (74 hp)
Spindle Taper	BT50 / ISO50
Tool Capacity	60
Table Rotation	360-degree B-axis indexing
Table Load Capacity	4,000 kg (8,818 lb)
Rapid Traverse Rate	20 m/min (787 ipm)
CNC Control	Hurco WinMax
Machine Weight	18,000 kg (39,683 lb)
Travels Capacityx Y Z W Axis Travel	55.1 x 54.7 x 43.3 x 19.7 in (1,400 x 1,389 x 1,099 x 500 mm)
Spindle Nose To Table Center	28.3 / 71.7 in (720 / 1,820 mm)
Max Weight On Table	8,819 lbs (4,000 kg)
T Slot Size	7 x 0.9 in (177 x 22 m)
B Axis Travel	Continuous
Spindlemax Spindle Speed	8-2,500 (high), 8-454 (low) rpm
Peak Spindle Motor Power	40.2 hp (30 kW)
Max Spindle Motor Torque	303.9 (high), 1,106.3 (low) ft lbs @ 695.5 rpm (412 (high), 1,500 (low) Nm @ 695.5 rpm)
Tool Changertool Type	CAT 50 (BT 50)
Spindle Quill Diameter	4.3 in (110 mm)
Max Tool Diameter	4.7 in (120 mm)
Max Tool Length	11.8 in (300 mm)
Max Tool Weight	55.1 lbs (25 kg)
Feedratesrapid Traverse Xyzw Axis	393.7, 393.7, 393.7, 157.5 in/min (10, 10, 10, 4 m/min)
Max Programmable Feedrate Xyzw Axis	393.7 in (10 m)
B Axis Max Rpm	1 rpm
Sizemax Operating Floor Space	218.4 x 207.3 in (5,598 x 5,272 mm)
Machine Height	132.7 in (3,370 mm)
Machine Weight	42,328 lb (19,200 kg)
Electricalpower Rating Full Load Kva	78 KVA

Specifications sourced from hurco.com — verified 2026-03-28

Strengths & Limitations

Strengths

Horizontal spindle with 500 mm W-axis quill reaches deep inside workpieces for boring operations impossible on VMCs
74 hp spindle with BT50 taper provides the power and rigidity for heavy boring bars and large face mills
B-axis rotary table enables multi-face machining in a single setup, eliminating refixturing for 4+1 sided work
WinMax conversational control saves hours of programming time compared to G-code-only boring mill controls
4,000 kg table load handles heavy castings, weldments, and structural components
40-tool ATC provides adequate capacity for complex multi-operation boring mill jobs

Limitations

Significant floor space requirement and machine weight (18,000 kg) need proper foundation and crane access
3,000 RPM spindle speed is optimized for boring and heavy milling, not high-speed finishing
Higher price point than VMC alternatives requires consistent large-part workloads to justify investment
BT50 tooling costs more than BT40/HSK-A63 tooling used in standard VMCs
Hurco's boring mill service expertise is less established than dedicated boring mill manufacturers like Kuraki or TOS

Best For

Job shops and contract manufacturers machining large castings with deep bored features on multiple faces Heavy equipment manufacturers producing gear housings, pump bodies, and structural weldments Energy sector shops machining turbine housings, valve bodies, and large flanges requiring multi-face access Shops replacing older boring mills that want WinMax conversational programming to reduce setup time Mold base manufacturers requiring precision boring and facing of large mold frames Fabrication shops finishing large weldments with precision bored holes and machined mounting surfaces

Frequently Asked Questions

01 What does a Hurco HBMx55i cost?

A new Hurco HBMx55i typically sells between $350,000 and $475,000 depending on options including probing, through-spindle coolant, chip management, and tooling. This positions it competitively against other boring mills in this table size class.

02 What is the W-axis quill and why does it matter?

The W-axis is a quill that extends from the spindle housing, allowing the spindle to reach deep inside workpieces without moving the entire spindle head. The 500 mm quill travel lets you bore deep holes, face internal surfaces, and reach features inside large castings that a standard Z-axis alone cannot reach.

03 How does a horizontal boring mill differ from a horizontal machining center?

A horizontal boring mill has a W-axis quill for deep boring, much larger table load capacity, and is designed for very large workpieces. Horizontal machining centers are designed for production work on smaller parts with pallet changers. Boring mills trade speed for reach, rigidity, and workpiece size capability.

04 What is the advantage of WinMax on a boring mill?

Boring mill jobs typically involve complex multi-face setups that take hours to program in G-code. WinMax lets operators define boring, milling, drilling, and tapping operations conversationally, significantly reducing programming time. On machines that often run one-off or small-batch jobs, this saves substantial time per setup.

05 Can the HBMx55i do continuous 4th-axis machining?

The B-axis table provides indexing for positioning the workpiece at specific angles for multi-face machining. For true continuous 4th-axis contouring, check with your Hurco distributor for the specific B-axis capability on the HBMx55i configuration you're considering.