INDEX R300

$450,000 - $650,000 Updated 2026-03-16

Key Specifications

Rapid Traverse

30 m/min (1,181 ipm)

Max Turn Length

600 mm (23.6 in)

max bar diameter

76 mm (3 in)

main spindle speed

5,000 RPM

main spindle power

22 kW (30 hp)

counter spindle speed

5,000 RPM

Overview

The INDEX R300 is a turning and machining center from INDEX-Traub featuring a rotating spindle design that combines the benefits of turn-mill capability with flexible multi-operation machining in a compact platform. The R300 targets precision production of complex rotational parts up to 76 mm (3 in) bar diameter, offering a main spindle, counter-spindle, turret, and milling spindle in configurations that enable complex front-back-side machining in a single setup from bar stock.

The main spindle operates at up to 5,000 RPM with a 22 kW (30 hp) motor, delivering the power required for aggressive roughing in medium-diameter steel and stainless work. The vertical milling spindle — a distinctive feature of the R-series — handles complex milling operations that would require a dedicated machining center in a traditional turning cell. Y-axis travel enables off-center milling and eccentric features that C-axis/live turret combinations cannot achieve as cleanly.

INDEX's iXpanel control system manages the turning spindles, vertical milling spindle, and all linear axes through a unified programming environment. The machine's compact construction keeps the footprint manageable while providing what INDEX calls a "turn-mill center" capability — completing parts that would otherwise require two or three machine passes. The bar feeder interface enables unattended production on complex parts with long cycle times.

At $450,000-$650,000, the R300 competes with DMG Mori's NTX series and Mazak's Integrex i-200 in the multi-function turn-mill class. INDEX's German engineering and reliability differentiate the R300 from Japanese competitors; the machine's architecture is distinct — featuring the separate vertical milling spindle rather than integrated turning-center-style milling — which provides certain flexibility advantages for shops with specific multi-operation requirements.

Full Specifications

Parameter	Value
Max Bar Diameter	76 mm (3 in)
Main Spindle Speed	5,000 RPM
Main Spindle Power	22 kW (30 hp)
Counter Spindle Speed	5,000 RPM
Milling Spindle Speed	12,000 RPM
Y Axis Travel	±80 mm (±3.1 in)
Max Turning Diameter	300 mm (11.8 in)
Max Turning Length	600 mm (23.6 in)
Tool Turret Stations	12 (live tooling)
Live Tool Speed	6,000 RPM
Rapid Traverse Rate	30 m/min (1,181 ipm)
CNC Control	INDEX iXpanel (SINUMERIK-based)
Machine Weight	~13,000 kg (28,660 lb)
Guest Name	Dietary Restriction
David	None
Bob	None
Nancy	None
Mary	Vegetarian
Formula	Formula Output
Index	3
Goal	Formula
Find Marys Dietary Restriction	=INDEX(A1:D6, MATCH("Mary", A1:A6, 0), MATCH("Dietary Restriction", A1:D1, 0))
Find Who Is At Table Number 2	=INDEX(A1:D6, MATCH(2, D1:D6, 0), MATCH("Guest Name", A1:D1, 0))

Strengths & Limitations

Strengths

Separate vertical milling spindle (12,000 RPM) provides machining center-grade milling capability within the turn-mill machine
Dual-spindle configuration with counter-spindle enables complete front-and-back machining in a single automated cycle
Y-axis (±80 mm) enables complex off-center milling and eccentric features beyond C-axis capability
76 mm bar capacity covers most production turning diameters for automotive, hydraulic, and aerospace components
INDEX German build quality for high-utilization 24/7 production environments
iXpanel unified control environment simplifies programming for the combined turning and milling operations

Limitations

$450K-$650K is a major investment requiring sustained complex-part production to justify
iXpanel control is Mitsubishi/SINUMERIK-based but INDEX-proprietary — different from Fanuc-standard shops
Vertical milling spindle architecture is different from conventional turn-mill machines — applications engineers needed during implementation
INDEX's multi-function machine service network in North America is smaller than DMG Mori or Mazak
13,000 kg machine requires engineered foundation and careful site planning

Best For

Precision manufacturers needing both turning and full machining center-grade milling in a single automated machine Aerospace component suppliers machining complex housings, manifolds, and structural parts requiring multiple operation types Industrial hydraulic manufacturers completing complex valve bodies with turning, milling, drilling, and threading in one setup Job shops with recurring complex-part contracts where multi-operation consolidation reduces lead time and fixture cost German-machine-preferred supply chains requiring INDEX certification for aerospace or automotive quality programs

Frequently Asked Questions

01 How does the INDEX R300 differ from the G300?

The R300 features a separate vertical milling spindle at 12,000 RPM that provides machining center-grade milling capability. The G300 uses dual live-tool turrets (12+12 stations) for milling. The R300 is better suited to parts requiring heavy milling operations; the G300 is more optimized for turning-dominated parts with secondary milling. Both offer dual-spindle front-back machining.

02 What types of parts are ideal for the INDEX R300?

The R300 excels on parts that require significant turning and significant milling — valve bodies with complex port networks, aerospace manifolds with multiple drill patterns, and housings requiring extensive facing and pocketing. If a part's program is 30-40% milling, the R300's dedicated milling spindle provides better productivity than turret-mounted live tools.

03 What is the maximum workpiece diameter?

The R300 handles bar stock to 76 mm (3 in) and chucked work to 300 mm (11.8 in) turning diameter. For chucked work requiring the vertical milling spindle, the work envelope is determined by the combined travel of the linear axes. Workpiece complexity determines whether the envelope is sufficient for a given part.

04 What does an INDEX R300 cost new?

New R300 machines typically price between $450,000 and $650,000 depending on configuration, tooling, and options. This is comparable to DMG Mori NTX series pricing in the multi-function turn-mill class. Used R300 machines appear periodically in the used market, typically priced at $200,000-$350,000 depending on age and condition.