INDEX TNL65

$600,000 - $900,000 Updated 2026-03-16

Key Specifications

Rapid Traverse

25 m/min

Max Turn Length

650 mm

max bar capacity

65 mm (2.559 in)

max machining diameter

65 mm (2.559 in)

max machining length

450 mm (17.72 in)

main spindle speed

5,000 RPM

Overview

The INDEX TNL65 is INDEX-Traub's largest Swiss-type CNC automatic lathe, providing 65mm bar capacity for the complete precision machining of large-diameter complex components using the sliding headstock Swiss-type architecture. The TNL65 extends the TNL series' approach—combining Swiss-type guide bushing precision with multi-axis CNC capability—to the demanding 65mm diameter class where few Swiss-type competitors operate.

At 65mm, the TNL65 addresses component families that sit at the upper boundary of Swiss-type machining: large hydraulic valve bodies, substantial orthopedic implant components, aerospace structural fittings, and heavy-duty industrial components where the guide bushing's precision benefit and single-setup machining capability deliver meaningful advantages over conventional turning approaches. The 65mm capacity opens these applications to INDEX's proven TNL Swiss-type architecture.

The TNL65 features Siemens 840D sl control—consistent with INDEX's premium machine philosophy—providing the multi-axis coordination, programming power, and simulation capability appropriate for complex 65mm Swiss-type programs. Y-axis for off-center milling, a counter spindle for complete front-and-back machining, and generous live tooling capacity enable the TNL65 to complete complex 65mm parts in a single cycle that would otherwise require multiple machines and setups.

INDEX's precision German engineering is particularly important at 65mm, where the cutting forces, thermal loads, and mechanical requirements are substantially greater than in the more common 20-32mm Swiss-type class. The TNL65's structural design, spindle specification, and guide bushing system are all scaled for sustained precision production at this demanding diameter, making it the choice for shops requiring Swiss-type capability at the 65mm class with the quality assurance of INDEX engineering.

Full Specifications

Parameter	Value
Max Bar Capacity	65 mm (2.559 in)
Max Machining Diameter	65 mm (2.559 in)
Max Machining Length	450 mm (17.72 in)
Main Spindle Speed	5,000 RPM
Counter Spindle Speed	5,000 RPM
Live Tool Speed	7,000 RPM
Number Of Axes	Up to 9 (including Y1, Y2, C1, C2)
Tool Positions	Up to 30 (including live tools)
Y Axis Stroke	±25 mm
Guide Bushing	Yes (guide bushing standard; NGB optional)
CNC Control	Siemens 840D sl (INDEX iXpanel)
Rapid Traverse Rate	25 m/min
Machine Weight	6,500 kg (14,330 lb)
Floor Space	4.5 m × 2.5 m
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))
Spindle Clearance	65 mm
Chuck Diameter	175 mm
Max Turning Length	650 mm

Specifications sourced from index-group.com — verified 2026-03-28

Strengths & Limitations

Strengths

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Limitations

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Best For

Aerospace manufacturers machining large hydraulic fittings, structural connectors, and actuator shafts requiring Swiss-type precision at 65mm Medical device manufacturers producing large orthopedic implant components (large stems, trial components) requiring guide bushing precision for slender part features Oil and gas suppliers machining precision valve bodies, spool assemblies, and downhole components in difficult alloys at 65mm Energy sector manufacturers requiring complete complex machining of large-diameter precision components in turbine and pump systems Contract manufacturers competing for the most demanding large-diameter Swiss-type programs requiring INDEX TNL65 capability Defense manufacturers machining large-diameter precision components for actuator systems, guidance hardware, and propulsion equipment

Frequently Asked Questions

01 What is the INDEX TNL65 price?

A new INDEX TNL65 typically ranges from approximately $600,000 to $900,000 depending on configuration, tooling package, and options. As a precision German-built Swiss-type machine at the largest available capacity class, the TNL65 is priced to reflect its engineering content, capability, and the limited competition in the 65mm Swiss-type market.

02 How does the INDEX TNL65 differ from the TNL32?

The TNL32 is INDEX's 32mm Swiss-type machine, which is more widely installed and serves the dominant 20-32mm Swiss-type market. The TNL65 doubles the bar capacity to 65mm, requires a substantially more robust machine structure and guide bushing system, and is priced and positioned for the demanding large-diameter segment where Swiss-type capability is rarer and the part value is typically much higher.

03 Why choose the TNL65 over an INDEX C400 for 65mm complex parts?

The TNL65 uses guide bushing technology, which provides superior precision and surface finish for longer, slender parts where the guide bushing support is essential. The C400 is a turn-mill machining center with B-axis 5-axis capability—superior for parts with compound-angle milled features. Choose TNL65 for precision-dominant turned parts; choose C400 when complex 5-axis simultaneous milling is the primary requirement.

04 What materials does the INDEX TNL65 handle?

The TNL65 handles the full range of aerospace and medical materials at 65mm: titanium (Ti-6Al-4V, Ti-5553), nickel superalloys (Inconel 625, 718), high-strength steel, stainless steel, and cobalt-chrome. The machine's robust construction, adequate spindle torque at large diameter, and high-pressure coolant capability are all relevant for these demanding materials.

05 Is NGB (non-guide bushing) operation possible on the TNL65?

NGB operation is available as an option on certain TNL65 configurations, enabling material savings on shorter parts where the guide bushing's precision benefit is less critical. The guide bushing remains standard and preferred for the long, slender parts that represent the TNL65's primary application. Consult INDEX-Traub applications engineering to determine guide bushing vs NGB optimization for specific part families.