DN Solutions Mill-Turn / Multi-Tasking Machines

DN Solutions SMX 5100 LSB

Est. $700,000 - $950,000 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

3,050 mm (120 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 LSB cost?

Estimated price range

Est.$700,000 - $950,000

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

Two spindles at 4,200 N·m (3,098 ft-lb) each define the DN Solutions SMX 5100 LSB. It is the large-chuck, sub-spindle version of the SMX 5100 mill-turn machine: a 21 in chuck, 830 mm (33 in) maximum turning diameter, 3,050 mm (120 in) turning length, and 37 kW (50 hp) and 1,500 rpm on both the main and the sub-spindle.

DN's table arranges the 3,050 mm (120 in) SMX 5100 models as a two-by-two grid. One choice is the spindle: the SMX 5100 L and SMX 5100 LS use a 15 in chuck with 2,400 rpm and 1,643 N·m (1,212 ft-lb), while the LB and LSB use the 21 in chuck with 1,500 rpm and 4,200 N·m (3,098 ft-lb). The other choice is whether a sub-spindle is fitted. The LSB takes the heavier option on both, and at 35,900 kg (79,146 lb) it outweighs the SMX 5100 LB, at 33,000 kg (72,753 lb), and the SMX 5100 LS, at 32,200 kg (70,989 lb).

The case for it is a part that needs heavy cutting at both ends. Large flanged shafts, couplings and hub-type parts often need as much metal removed from the second side as from the first, and a lighter sub-spindle would turn the second operation into the bottleneck. With identical figures on each side, the same inserts, depths and feeds can be used after the transfer.

Speed is the constraint. Both spindles stop at 1,500 rpm, so small diameters and fine finishing passes run below their ideal cutting speed. The machine occupies 9,522 × 3,597 × 3,346 mm (375 × 142 × 132 in). DN's series description adds B-axis and C-axis control to 0.0001 degree and a swivelling operation panel that moves side to side, but the table gives no milling spindle or magazine figures.

Full Specifications

Parameter	Value
Chuck Size	21 in
Max Turning Diameter	830 mm (33 in)
Max Turning Length	3,050 mm (120 in)
Max Spindle Speed	1,500 rpm
Spindle Motor Power	37 kW (50 hp)
Spindle Torque	4,200 N·m (3,098 ft-lb)
Sub Spindle Speed	1,500 rpm
Sub Spindle Power	37 kW (50 hp)
Sub Spindle Torque	4,200 N·m (3,098 ft-lb)
Floor Space Required	9,522 × 3,597 × 3,346 mm (375 × 142 × 132 in)
Machine Weight	35,900 kg (79,146 lb)

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

Strengths & Limitations

Strengths

4,200 N·m (3,098 ft-lb) on the main spindle and the same again on the sub-spindle
21 in chuck with an 830 mm (33 in) turning diameter and 3,050 mm (120 in) turning length
Second-side roughing at full torque, where the SMX 5100 LS offers 1,643 N·m (1,212 ft-lb)
37 kW (50 hp) available on each spindle, so both operations can run at full load
Series-level thermal compensation of the spindle and feed axes for long, heavy cycles

Limitations

Both spindles are limited to 1,500 rpm; the SMX 5100 LS runs to 2,400 rpm
Heaviest of the 3,050 mm (120 in) models at 35,900 kg (79,146 lb)
Footprint is 9,522 mm (375 in) long, before allowing for loading space
The table gives no spindle bore, bar capacity, sub-spindle chuck or spindle-to-spindle distance

Best For

Large flanged shafts and hubs that need heavy cuts on both sides Low-speed, high-torque turning of large-diameter parts up to 830 mm (33 in) Done-in-one machining of heavy parts up to 3,050 mm (120 in) long Production where a weaker second spindle would limit the cycle

Frequently Asked Questions

01 How much torque does each spindle of the SMX 5100 LSB have?

DN lists 4,200 N·m (3,098 ft-lb) for the main spindle and 4,200 N·m (3,098 ft-lb) for the sub-spindle, each with 37 kW (50 hp) and a 1,500 rpm maximum. The table does not give the speed range over which that torque is held.

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

By the sub-spindle. The SMX 5100 LB has the same 21 in chuck, 1,500 rpm and 4,200 N·m (3,098 ft-lb) main spindle but lists no second spindle, and weighs 33,000 kg (72,753 lb). The SMX 5100 LSB adds a sub-spindle with matching figures, weighs 35,900 kg (79,146 lb) and is 9,522 mm (375 in) long against 9,222 mm (363 in) for the SMX 5100 LB.

03 Is the SMX 5100 LSB suitable for small parts?

It will machine them, but it is not built for them. A 1,500 rpm ceiling means small diameters cannot reach normal carbide cutting speeds, and a 21 in chuck is awkward for small work. If a meaningful share of the work is small-diameter, the SMX 5100 LS with a 15 in chuck and 2,400 rpm is the closer fit in this size.

04 What does the machine weigh and how much room does it need?

35,900 kg (79,146 lb), on a footprint of 9,522 × 3,597 × 3,346 mm (375 × 142 × 132 in) with the height listed last. A machine this heavy carrying heavy parts usually calls for a foundation review; give your builder the machine weight and your maximum workpiece weight together.

05 Which milling and tool-handling features are listed?

At series level DN describes B-axis and C-axis control to 0.0001 degree, a front-located tool magazine with an ATC operation panel, a 12-station servo turret and a work guidance function. The comparison table for the SMX 5100 LSB has no rows for the milling spindle, magazine capacity or turret, so ask DN which of these apply to this model and with what figures.