Tooling / ROMAI
Tooling · Made in Germany
ROMAI angle heads, multi-spindle heads and driven tools
Angular heads, multi-spindle heads, driven tools and high-speed spindles from ROMAI in Germany, standard or custom-built. Prella quotes and supports them in North America.
50+
Years of experience
80%+
In-house production
ISO 9001
DIN EN ISO 9001:2015
Germany
Family-owned and made in Germany
Product range
ROMAI product families
ROMAI's range follows the machine: angular and multi-spindle heads for machining centers, driven tools for lathes, high-speed spindles and machine components.
Angular heads
4 models
For machining centers, with fixed or variable angles and one or more spindles. Internal MQL coolant available.
90° angle heads
Form S and S-2
Standard 90° angle heads for jobs without geometric constraints. Form S-2 adds a bilateral output.
More info
Set-back output
Form W and G
90° heads with set-back output to maximize usable tool length. Form G is built for strong geometric constraints.
More info
Fixed or adjustable angle
Form F and D
Form F works in one fixed angle. Form D sets any angle from 0° to 90°, up to 110° as an option.
0°–90°, 110° optional
More info
Slim angle heads
Compact Line and Form X
Compact Line heads are 30% more compact and lighter than the previous standard series, with the same performance data.
More info
Multi-spindle heads
1 model
Two or more spindles in one head, with fixed or adjustable spacing.
Stationary, changeable, adjustable
Multi-Spindle Heads
Stationary and changeable heads for large series; adjustable types ASP, KR/KF and MBK-V for small batches. Specials built to order.
More info
Driven tools
1 model
For lathes, axial, radial or angled, with one or more spindles.
Forms A, Z, S, S-2, W, G, F, D
Driven Tools
Axial, offset-axis, radial 90°, set-back, fixed-angle and adjustable 0–90° live tools for lathes. Custom gear ratios and coolant concepts.
More info
High-speed spindles and machine components
1 model
ROMAI high-speed spindles reach over 100,000 rpm depending on version and retrofit to existing CNC machines. ROMAI also builds machine components.
Star turrets, revolver drill heads
Machine Components
Star turrets, revolver drill heads and turrets, developed and built by ROMAI.
More info
Featured · ROMAI angle heads
Reach side holes and undercuts with 90° angle heads
Standard 90° angle heads for jobs without geometric constraints. Form S-2 adds a bilateral output.
Request a ROMAI quoteApplications
Where ROMAI heads are used
Automotive
Angle and multi-spindle heads for drilling and milling in series production.
Typical choice: Multi-Spindle Heads
Aerospace
Angle heads and high-speed spindles for precise contours and hard-to-reach features.
Medical and dental
High-speed spindles for ceramics, titanium and plastics.
Typical choice: Machine Components
Wind and solar energy
Heavy angle heads with high torque for large components.
Tool and mold making
Fine machining of contours, engravings and polished surfaces.
Machine building
Custom heads, turrets and components for machine builders.
Typical choice: Machine Components
Specifications
ROMAI range at a glance
Show technical data (6 models)
Swipe sideways to see all columns.
Product
Key figure
Value
Angular heads
Speed
Up to 40,000 rpm (custom transmissions)
Angular heads
Output torque
Up to 10,000 Nm (7,376 lb-ft)
Angular heads
Coolant pressure
Up to 70 bar (1,015 psi), up to 140 bar (2,030 psi) by application
Angular heads, driven tools
Tool holders
e.g. ER, Weldon, HSK
Multi-spindle heads
Spindles / spacing
2 or more / fixed or adjustable
High-speed spindles
Speed / ratio
Over 100,000 rpm / up to 1:10
Gallery
ROMAI heads up close
About ROMAI
Specialist in transmission tools for machining
ROMAI Robert Maier GmbH is a family-owned company in Vaihingen an der Enz, Germany, with more than 50 years of experience in angle heads and transmission gears. More than 80 people work there, and over 80% of production is done in-house.
ROMAI builds standard and special versions for medical technology, automotive, wind power, aerospace, household appliances, solar energy and machine building. The company is certified to DIN EN ISO 9001:2015 and also repairs gearboxes from other makers.
More than 50 years of experience
Family-owned, made in Germany
Over 80% in-house production
DIN EN ISO 9001:2015
Why buy through Prella
US-based sales and support
One team in East Dundee, IL for quotes, delivery, start-up and service across North America.
Configured to your application
Models, options and accessories selected with the manufacturer for your parts, process and plant.
Manuals one scan away
Every machine ships with a QR code linking to its manuals and drawings, matched to its serial number.
Angle heads and multi-spindle heads for CNC machining
ROMAI angle heads turn the spindle of a machining center 90°, to a fixed angle or to any angle from 0° to 90°. That lets one machine drill, ream, countersink, thread and mill side features without a second setup. Forms S and S-2 cover jobs with free access. Forms W and G have a set-back output for deep pockets and narrow bores. Form D adds a fine-adjustable angle. Multi-spindle heads machine several holes at once, stationary or changeable for large series, adjustable for small batches. Many heads offer internal MQL coolant.
For lathes, ROMAI driven tools come in axial, radial and angled forms. High-speed spindles add more than 100,000 rpm, depending on version, for micro-machining. Machine components such as star turrets and revolver drill heads complete the range. ROMAI also maintains and repairs gearboxes of other makes, and ROlog logs operating data in real time. Prella Technologies quotes ROMAI tooling for US manufacturers.
ROMAI: frequently asked questions
What is the difference between ROMAI angle head forms?
Form S is a standard 90° head and S-2 adds a second output. Forms W and G have a set-back output to maximize usable tool length in tight spaces. Form F works at one fixed angle, Form D adjusts from 0° to 90° (110° optional), and Form X is extremely compact. Special versions are built to customer requirements.
Can ROMAI build a custom angle head or multi-spindle head?
Yes. Special versions are a core part of ROMAI's work. Heads can be adapted with special tool holders, gear ratios, cooling concepts, spindle counts and spacing. Send Prella your part drawing, machine model and spindle interface, and we will forward a complete request to ROMAI for a technical proposal.
Does ROMAI repair angle heads from other manufacturers?
Yes. ROMAI maintains and repairs angle heads, multi-spindle heads, driven tools, high-speed spindles and gears, including products from third-party makers. Signs a head needs service include lost precision, poor surface finish, overheating, unusual noise or crash damage. After inspection, ROMAI sends a cost estimate before the repair.
What is ROlog?
ROlog is ROMAI's operation logger for its transmission gearboxes. Sensors record speed, temperature, impulses and operating hours, and flag events when values exceed set limits. Data is read by Bluetooth or NFC with the ROlog app for Android and iOS, helping plan maintenance. Compatibility depends on the gearbox, so ask Prella to confirm.
Need an angle head or a custom solution?
Share your machine, spindle interface and part drawing. Prella will work with ROMAI on the right standard or special head and send you a quote.