DN Solutions Mill-Turn / Multi-Tasking Machines

DN Solutions SMX 5100 L

Est. $550,000 - $750,000 Specs verified 2026-10-02 · dn-solutions.com Updated 2026-10-02

Image: dn-solutions.com, DN Solutions

Key Specifications

Max Spindle

2,400 rpm

Spindle Power

37 kW (50 hp)

Max Turn Length

3,050 mm (120 in)

chuck size

15 in

max turning diameter

830 mm (33 in)

spindle torque

1,643 N·m (1,212 ft-lb)

How much does the DN Solutions SMX 5100 L cost?

Estimated price range

Est.$550,000 - $750,000

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 L is a large mill-turn machine for shaft-type work: 830 mm (33 in) maximum turning diameter, 3,050 mm (120 in) turning length and a 15 in chuck. The spindle is rated 37 kW (50 hp) and 1,643 N·m (1,212 ft-lb), with a top speed of 2,400 rpm.

Within the SMX 5100 line this is the plain configuration: one spindle, the smaller of two chuck sizes, the shorter of two beds. Each of those has an alternative in DN's table. The SMX 5100 LB swaps in a 21 in chuck and a 1,500 rpm spindle with 4,200 N·m (3,098 ft-lb). The SMX 5100 LS adds a sub-spindle with the same ratings as the main one. The SMX 5100 XL extends turning length to 4,070 mm (160 in). Of these, the SMX 5100 L is the lightest at 31,000 kg (68,343 lb).

Compared with the next size down, the step is in every direction at once. The SMX 3100 L turns 660 mm (26 in) by 2,540 mm (100 in) with 30 kW (40 hp) and 1,203 N·m (887 ft-lb) at 3,000 rpm. Against the SMX 3100 L, the SMX 5100 L gains diameter, length, power and about 37% more torque, and gives up a fifth of the top speed.

At this size the installation is part of the decision. The footprint is 9,222 × 3,597 × 3,346 mm (363 × 142 × 132 in), with the height last, and a 3,050 mm (120 in) workpiece has to be craned in from the front. DN's series notes describe an orthogonal structure, B-axis and C-axis control to 0.0001 degree, and an operation panel that slides side to side, swivels and adjusts in height.

Full Specifications

Parameter	Value
Chuck Size	15 in
Max Turning Diameter	830 mm (33 in)
Max Turning Length	3,050 mm (120 in)
Max Spindle Speed	2,400 rpm
Spindle Motor Power	37 kW (50 hp)
Spindle Torque	1,643 N·m (1,212 ft-lb)
Floor Space Required	9,222 × 3,597 × 3,346 mm (363 × 142 × 132 in)
Machine Weight	31,000 kg (68,343 lb)

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

Strengths & Limitations

Strengths

830 mm (33 in) turning diameter and 3,050 mm (120 in) turning length on a 15 in chuck
37 kW (50 hp) spindle with 1,643 N·m (1,212 ft-lb) for roughing large shafts
2,400 rpm top speed, against 1,500 rpm on the 21 in chuck SMX 5100 LB
Lightest of the SMX 5100 variants at 31,000 kg (68,343 lb)
Movable, swivelling, height-adjustable operation panel described for the series, useful along a bed this long

Limitations

1,643 N·m (1,212 ft-lb) is well short of the 4,200 N·m (3,098 ft-lb) of the SMX 5100 LB for large-diameter roughing
No sub-spindle row; the SMX 5100 LS is the version that lists one
Occupies 9,222 × 3,597 mm (363 × 142 in) of floor and weighs 31,000 kg (68,343 lb)
DN's table has no figures for the milling spindle, tool magazine, tailstock or steady rests on this model

Best For

Shafts and rolls up to 3,050 mm (120 in) long and 830 mm (33 in) in diameter Long parts where 2,400 rpm is wanted for smaller journals and finishing Large turned parts with milled and drilled features set by the B-axis and C-axis Work that has outgrown the 660 mm (26 in) swing of the SMX 3100 L

Frequently Asked Questions

01 What is the working envelope of the SMX 5100 L?

Maximum turning diameter is 830 mm (33 in) and maximum turning length is 3,050 mm (120 in), with a 15 in chuck. DN's table does not list bar capacity, axis travels or the weight a part may have between centres, so check heavy or unusual workpieces with DN before committing.

02 How does the SMX 5100 L differ from the SMX 5100 LB?

Chuck and spindle. The SMX 5100 L has a 15 in chuck, 2,400 rpm and 1,643 N·m (1,212 ft-lb). The SMX 5100 LB has a 21 in chuck, 1,500 rpm and 4,200 N·m (3,098 ft-lb). Both are 37 kW (50 hp) with the same 830 mm (33 in) by 3,050 mm (120 in) envelope, and the SMX 5100 LB weighs 33,000 kg (72,753 lb) against 31,000 kg (68,343 lb).

03 Is there a sub-spindle on the SMX 5100 L?

Not according to DN's table, which lists a single spindle for this model. The SMX 5100 LS is the same size of machine with a sub-spindle rated 2,400 rpm, 37 kW (50 hp) and 1,643 N·m (1,212 ft-lb), and it weighs 32,200 kg (70,989 lb).

04 How much bigger is it than the SMX 3100 L?

The SMX 3100 L turns 660 mm (26 in) by 2,540 mm (100 in) with a 12 in chuck, 30 kW (40 hp) and 1,203 N·m (887 ft-lb), and weighs 20,100 kg (44,313 lb). The SMX 5100 L turns 830 mm (33 in) by 3,050 mm (120 in) with a 15 in chuck, 37 kW (50 hp) and 1,643 N·m (1,212 ft-lb), and weighs 31,000 kg (68,343 lb).

05 What should I plan for when installing an SMX 5100 L?

A footprint of 9,222 × 3,597 × 3,346 mm (363 × 142 × 132 in) and a machine weight of 31,000 kg (68,343 lb), before the workpiece. Parts near 3,050 mm (120 in) long need overhead lifting along the front of the machine. The tool magazine and its ATC operation panel are at the front as well, so that side must stay accessible.