DN Solutions Mill-Turn / Multi-Tasking Machines

DN Solutions SMX 5100 XLB

Est. $850,000 - $1,200,000 Specs verified 2026-10-02 · dn-solutions.com Updated 2026-10-02

Image: dn-solutions.com, DN Solutions

Key Specifications

Max Spindle

1,500 rpm

Spindle Power

37 kW (50 hp)

Max Turn Length

4,070 mm (160 in)

chuck size

21 in

max turning diameter

830 mm (33 in)

spindle torque

4,200 N·m (3,098 ft-lb)

How much does the DN Solutions SMX 5100 XLB cost?

Estimated price range

Est.$850,000 - $1,200,000

Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from DN Solutions. Configuration moves it a long way.

Overview

The DN Solutions SMX 5100 XLB combines the long bed and the large chuck of the SMX 5100 line: a 4,070 mm (160 in) turning length and a 21 in chuck on a spindle listed at 4,200 N·m (3,098 ft-lb). Maximum turning diameter is 830 mm (33 in), spindle power is 37 kW (50 hp) and top speed is 1,500 rpm.

At 39,000 kg (85,980 lb) it weighs more than the SMX 5100 XL, at 37,000 kg (81,571 lb), and more than the SMX 5100 LB, at 33,000 kg (72,753 lb), which has the same spindle on a 3,050 mm (120 in) bed. The footprint is 10,749 × 3,597 × 3,398 mm (423 × 142 × 134 in). Those numbers set the terms of the project: foundation, crane capacity and transport route need to be settled alongside the machine order, not after it.

The spindle is built for torque. From the same 37 kW (50 hp), the SMX 5100 XL delivers 1,643 N·m (1,212 ft-lb) at up to 2,400 rpm, while this machine delivers 4,200 N·m (3,098 ft-lb) at up to 1,500 rpm. Long parts of large diameter are heavy, are usually rough-turned from forgings or thick bar, and turn slowly, so the low speed is no handicap on the work the XLB is meant for. It becomes one only where a long part also has small journals that want higher rpm.

Support for long work is the open question. DN's table for the XLB has no rows for a tailstock, steady rests or a sub-spindle, and no maximum workpiece weight. The series description covers the B-axis and C-axis, controlled to 0.0001 degree, a front tool magazine with an ATC operation panel, and thermal compensation for long machining runs.

Full Specifications

Parameter	Value
Chuck Size	21 in
Max Turning Diameter	830 mm (33 in)
Max Turning Length	4,070 mm (160 in)
Max Spindle Speed	1,500 rpm
Spindle Motor Power	37 kW (50 hp)
Spindle Torque	4,200 N·m (3,098 ft-lb)
Floor Space Required	10,749 × 3,597 × 3,398 mm (423 × 142 × 134 in)
Machine Weight	39,000 kg (85,980 lb)

Specifications sourced from dn-solutions.com — verified 2026-10-02

Strengths & Limitations

Strengths

4,200 N·m (3,098 ft-lb) of spindle torque on a 4,070 mm (160 in) turning length
21 in chuck for large-diameter gripping within the 830 mm (33 in) turning limit
About 2.6 times the torque of the SMX 5100 XL, which lists 1,643 N·m (1,212 ft-lb)
Same 10,749 × 3,597 × 3,398 mm (423 × 142 × 134 in) footprint as the SMX 5100 XL despite the larger chuck and spindle
Thermal compensation for spindle and feed axes described for the series, relevant when one part runs for a whole shift

Limitations

Spindle speed tops out at 1,500 rpm, against 2,400 rpm on the SMX 5100 XL, limiting small-diameter features on long parts
39,000 kg (85,980 lb) of machine weight and a 10,749 mm (423 in) length demand early foundation and crane planning
DN's table does not list a tailstock, steady rest, sub-spindle or maximum workpiece weight for this model
Milling spindle speed and tool magazine capacity are not stated

Best For

Heavy shafts and rolls up to 4,070 mm (160 in) long and 830 mm (33 in) in diameter Rough turning of long forgings where 4,200 N·m (3,098 ft-lb) sets the depth of cut Long, large-diameter parts that also need milled or drilled features in the same setup Low-volume work where re-fixturing a long, heavy part is the main risk

Frequently Asked Questions

01 What is the SMX 5100 XLB designed to do?

Turn and mill long, heavy, large-diameter parts in one setup. The table gives a 4,070 mm (160 in) turning length, an 830 mm (33 in) turning diameter, a 21 in chuck and a spindle with 37 kW (50 hp), 4,200 N·m (3,098 ft-lb) and 1,500 rpm. DN describes the SMX series as a multi-axis mill-turn machine with B-axis and C-axis control.

02 How does the SMX 5100 XLB differ from the SMX 5100 XL?

In chuck, speed, torque and weight. The SMX 5100 XL has a 15 in chuck, 2,400 rpm, 1,643 N·m (1,212 ft-lb) and weighs 37,000 kg (81,571 lb). The SMX 5100 XLB has a 21 in chuck, 1,500 rpm, 4,200 N·m (3,098 ft-lb) and weighs 39,000 kg (85,980 lb). Turning length, turning diameter, power and footprint are the same.

03 Do I need the 4,070 mm bed, or is the SMX 5100 LB enough?

The SMX 5100 LB has the same 21 in chuck and 4,200 N·m (3,098 ft-lb) spindle with a 3,050 mm (120 in) turning length and weighs 33,000 kg (72,753 lb). The XLB turns 4,070 mm (160 in) and weighs 39,000 kg (85,980 lb) on a 10,749 mm (423 in) long footprint. If no regular part exceeds the 3,050 mm (120 in) of the SMX 5100 LB, the shorter machine saves floor length.

04 What should be confirmed with DN before ordering?

Everything about workpiece support and weight, because the table is silent on it: tailstock, steady rests, and the maximum part weight between chuck and support. Also ask for the milling spindle speed and power and the tool magazine capacity, none of which appear in the comparison table for the SMX 5100 XLB.

05 How heavy is the SMX 5100 XLB?

39,000 kg (85,980 lb) for the machine. The footprint is 10,749 × 3,597 × 3,398 mm (423 × 142 × 134 in), listed as length, width and height. For comparison, the SMX 5100 XL weighs 37,000 kg (81,571 lb) and the SMX 5100 LB 33,000 kg (72,753 lb).