Handtmann HMZ 300

$1,200,000 - $2,500,000+ Updated 2026-03-17

Key Specifications

Spindle Taper

HSK-A63

Rapid Traverse

60 m/min

Spindle Power

55 kW (73.7 hp)

machine type

Horizontal 5-axis machining center with B-axis rotary table

x travel

900 mm (35.4 in)

y travel

900 mm (35.4 in)

Overview

The Handtmann HMZ 300 is a horizontal 5-axis machining center developed by Handtmann for the aerospace structural and precision mechanical machining segments where a horizontal spindle orientation provides chip evacuation, fixturing, and productivity advantages over vertical configurations for specific workpiece families. While Handtmann's reputation is primarily associated with their PBT series vertical 5-axis gantry machines for large aerospace structural panels, the HMZ 300 extends the Handtmann lineup into the horizontal machining center segment for aerospace frame components, precision structural castings, and medium-format structural parts that benefit from horizontal spindle access and gravity-assisted chip fall.

The HMZ 300 uses a horizontal spindle with a rotary B-axis table, providing 4-axis (and with the 5-axis head option, full 5-axis) positioning and contouring capability on compact, boxy aerospace structural components — bulkhead fittings, actuator brackets, landing gear components, engine mount structures, and similar aerospace mechanical parts where all six faces require machining and horizontal pallet-based production is standard. The B-axis rotary table allows four-sided access to the workpiece in a single clamping, a productivity advantage that horizontal machining centers deliver over vertical machines for this class of compact structural aerospace component.

For aerospace aluminum structural machining, the horizontal orientation provides continuous chip fall away from the cutting zone without re-cutting concerns, which is significant in the deep-cavity and pocket machining that aerospace structural components require. High-pressure coolant flushes chips from deep pockets effectively in the horizontal orientation, maintaining surface quality and tool life in the extended pocket milling sequences that aerospace aluminum structural components typically involve. The HMZ 300 supports twin-pallet operation for load/unload operations while machining, a standard productivity enabler in aerospace and precision mechanical HMC applications.

Handtmann equips the HMZ 300 with Siemens Sinumerik 840D sl, maintaining control platform consistency with their PBT series vertical machines and enabling aerospace manufacturing suppliers to standardize post-processors and operator training across the Handtmann machine range in their facilities. The HMZ 300 is positioned for aerospace suppliers who need Handtmann's material knowledge and application focus in a horizontal machining center format for components where PBT series vertical machines are not the optimal machine choice.

Full Specifications

Parameter	Value
Machine Type	Horizontal 5-axis machining center with B-axis rotary table
X Travel	900 mm (35.4 in)
Y Travel	900 mm (35.4 in)
Z Travel	1,000 mm (39.4 in)
B Axis Range	360° continuous (rotary table)
A Axis Range	+/- 110° (optional 5-axis head)
Pallet Size	630 x 630 mm
Spindle Speed	28,000 RPM
Spindle Motor Power	55 kW (73.7 hp)
Spindle Taper	HSK-A63
Rapid Traverse Rate	60 m/min
Tool Changer	Automatic, 60-120 position
Pallet Changer	Twin-pallet automatic pallet changer
CNC Control	Siemens Sinumerik 840D sl
Frame	Fixed column, moving table/spindle, cast iron structure

Specifications sourced from handtmann.us — verified 2026-03-28

Strengths & Limitations

Strengths

Horizontal spindle orientation provides gravity-assisted chip fall from deep pockets and complex aerospace structural cavities, preventing chip re-cutting and maintaining surface quality in long aluminum structural machining programs
Twin-pallet automatic pallet changer enables continuous machine utilization by loading and unloading on one pallet while the other is in the cutting zone, critical for aerospace production HMC environments
55 kW high-power spindle supports aggressive material removal in aerospace aluminum structural components at the chip loads and feed rates needed to achieve competitive cycle times on complex mechanical aerospace parts
B-axis rotary table with 360° positioning provides four-sided workpiece access in a single clamping, dramatically reducing setup time and improving positional accuracy for boxy aerospace structural and mechanical components
Siemens Sinumerik 840D sl control maintains post-processor and operator commonality with Handtmann PBT series vertical machines in aerospace supply chain facilities standardized on Siemens

Limitations

The HMZ 300's 630 mm pallet size limits the maximum workpiece dimensions it can accommodate, making it unsuitable for the long, slender structural panels and spar sections that are the primary applications of Handtmann's PBT series machines
Handtmann's horizontal machining center presence is smaller than their PBT series vertical machine brand, with fewer published HMC-specific references and application case studies compared to established HMC specialists like Mazak, Okuma, and Makino
The 5-axis head option adds cost and complexity for applications that can be completed effectively with 4-axis B-axis indexing, and the full 5-axis configuration must be specified at order time rather than added retrospectively

Best For

Aerospace structural and mechanical component manufacturers machining aluminum bulkhead fittings, actuator brackets, engine mount structures, and landing gear components requiring four-sided access in a horizontal production environment Aerospace Tier 1 suppliers running pallet-based horizontal machining cell production for medium-format structural aluminum components where continuous machine utilization through twin-pallet operation drives cost competitiveness Precision aerospace mechanical part producers machining complex aluminum and titanium alloy structural fittings, hydraulic manifolds, and actuation system components requiring 5-axis simultaneous contouring capability Defense aerospace and space structure manufacturers machining precision aluminum and titanium structural brackets, housings, and interface fittings for satellite, missile, and aircraft structural assemblies

Frequently Asked Questions

01 Why choose a horizontal machining center over a vertical 5-axis machine for aerospace aluminum structural parts?

For compact, boxy aerospace structural components that require machining on multiple faces, horizontal machining centers offer two key advantages over vertical machines: gravity-assisted chip fall that keeps chips away from the cutting zone in deep pockets, and B-axis rotary table access to four workpiece faces in a single clamping. For long, slender panels and spars, the PBT series vertical gantry machines are the better choice. The HMZ 300 fills the horizontal HMC application space for aerospace structural components that fit a 630 mm pallet format.

02 What pallet size does the HMZ 300 use?

The Handtmann HMZ 300 uses 630 x 630 mm pallets. This is a standard aerospace and precision HMC pallet size that is compatible with a wide range of modular fixturing systems including Erowa, System 3R, and Zero-Point systems. The twin-pallet APC system uses two 630 mm pallets, enabling load/unload operations while the machine is in cycle.

03 What is the spindle speed and tooling interface on the HMZ 300?

The Handtmann HMZ 300 uses an HSK-A63 spindle interface at 28,000 RPM with 55 kW spindle power. This covers the high-speed aluminum structural machining range while providing the torque required for the titanium alloy structural fittings and hardened steel components that aerospace mechanical part programs sometimes include. HSK-A63 is the standard aerospace and precision machining tooling interface, providing broad toolholder and tooling system compatibility.

04 Can the HMZ 300 machine titanium aerospace structural components?

Yes. The HMZ 300's 55 kW spindle and rigid horizontal structure support titanium alloy machining for aerospace structural fittings, brackets, and interface hardware. Titanium requires significantly lower cutting speeds and feed rates than aluminum, and the material removal rate is much lower. High-pressure coolant through the spindle is important for titanium chip management and tool life. For high-volume titanium structural machining, the HMZ 300's horizontal configuration and chip management system are well-suited to the controlled-chip removal that titanium machining demands.

05 How does the HMZ 300 fit into a Handtmann aerospace machining cell alongside PBT series machines?

In an aerospace machining facility, the Handtmann PBT series vertical gantry machines handle large-format panels, ribs, and spars, while the HMZ 300 handles the compact structural fittings, brackets, and mechanical components that require horizontal pallet-based production. The two machine types complement each other in an aerospace machining facility — the PBT covers the large structural machining, and the HMZ 300 covers the compact structural and mechanical machining, both running Siemens Sinumerik 840D sl for a unified CAM and programming environment.