DN Solutions SMX 2100 SB

$280,000 - $395,000 Updated 2026-03-19

Key Specifications

Max Turn Length

1040 mm

max turning diameter

600 mm

chuck size left

10 in

chuck size right

8 in

left spindle speed

4,000 RPM

left spindle power

22 kW (29.5 hp)

Overview

The DN Solutions SMX 2100 SB is the big-bore sub spindle variant of the SMX 2100, stepping up to a 10-inch chuck on the left spindle for larger-diameter workholding. The B designation means bigger chuck — 10 inches vs the standard 8 inches on the SMX 2100 S — giving you more gripping range on larger parts while keeping the sub spindle for back-working.

The left spindle runs at 4,000 RPM with 22 kW (29.5 hp) and 512 Nm (378 ft-lbs) of torque. That's slower than the 5,000 RPM on the 8-inch chuck variants, but the trade-off gets you more torque and a bigger bore for larger bar stock. The right sub spindle runs at 5,000 RPM with 22 kW and 467 Nm — still the standard 8-inch configuration — handling back-working on the second end. The B-axis milling spindle delivers 12,000 RPM for angular machining.

Max turning diameter is 600 mm (23.6 in) across 1,040 mm (40.9 in) of turning length. The machine weighs 15,300 kg (33,730 lb) on a 4,845 x 2,770 x 2,777 mm footprint. Running on the FANUC 31i-B5 control with CUFOS, it handles full 5-axis simultaneous machining.

The SB fills a specific niche: shops that need the SMX 2100's multi-tasking capability but work with parts that exceed the 8-inch chuck's gripping range. If you're machining flanges, larger valve bodies, or pump housings that need a 10-inch chuck on the first op but can finish the second end in an 8-inch, the SB is your machine. It slots between the SMX 2100 S and the larger SMX 2600 in both capability and price, making it a smart choice when the 8-inch chuck is too small but the 2600's 10-inch-both-sides setup is more than you need.

Full Specifications

Parameter	Value
Max Turning Diameter	600 mm
Max Turning Length	1040 mm
Chuck Size Left	10 in
Chuck Size Right	8 in
Left Spindle Speed	4,000 RPM
Left Spindle Power	22 kW (29.5 hp)
Left Spindle Torque	512 Nm (378 ft-lbs)
Right Spindle Speed	5,000 RPM
Right Spindle Power	22 kW (29.5 hp)
Right Spindle Torque	467 Nm (344 ft-lbs)
Milling Spindle Speed	12,000 RPM
B Axis Range	240° (+/-120°)
Machine Weight	15,300 kg (33,730 lb)
Machine Dimensions	4,845 x 2,770 x 2,777 mm
CNC Control	FANUC 31i-B5 with CUFOS
Chuck Size	10 inch
Metric	IMPERIAL
Capacity	Chuck sizeMax. Turning DiameterMax. Turning Length
Left Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle Torque
Right Spindle	Max. Spindle SpeedMax. Spindle PowerMax. Spindle Torque
Dimensions	LengthHeightWidthWeight
Favorites	SMX5100XLB

Specifications sourced from dn-solutions.com — verified 2026-03-28

Strengths & Limitations

Strengths

10-inch left chuck handles larger-diameter parts that won't fit in the 8-inch chuck variants without jumping to the SMX 2600
512 Nm torque on the main spindle provides strong cutting force for steel and stainless turning at moderate speeds
Full sub spindle at 5,000 RPM and 22 kW handles back-working with genuine cutting capability
B-axis milling at 12,000 RPM with 5-axis simultaneous capability covers complex angular features
Same compact footprint as the standard SMX 2100 S — no floor space penalty for the bigger chuck
Priced between the SMX 2100 S and SMX 2600, filling a gap for shops that need a bit more chuck size

Limitations

4,000 RPM left spindle is slower than the 5,000 RPM on 8-inch variants — limits SFM on small-diameter turning
Mixed chuck sizes (10-inch left, 8-inch right) mean you can't transfer full-diameter parts between spindles
1,040 mm turning length may be limiting for longer shaft-type parts — need to step to the L variants
22 kW power on both spindles falls short for aggressive roughing on tough alloys compared to 30 kW machines

Best For

Shops machining flanges, valve bodies, and pump housings in the 8-10 inch diameter range that need multi-tasking with back-working Production environments where the 8-inch chuck is too small for first-op gripping but the SMX 2600's bigger platform is overkill Aerospace and defense shops working medium-diameter components with complex milling features and features on both ends Job shops wanting a versatile multi-tasking platform that covers a wider workpiece diameter range than the standard 8-inch variants

Frequently Asked Questions

01 Why does the SB have different chuck sizes on each spindle?

The B designation on the left spindle means 'big bore' — a 10-inch chuck for larger parts. The right sub spindle stays at 8 inches because many parts that need a bigger grip on the first op have a smaller finished diameter on the second end. This mixed configuration covers more part geometries than matching 8-inch chucks on both sides.

02 What does a new SMX 2100 SB cost?

Expect $280,000 to $395,000 for a new machine. The 10-inch chuck configuration adds a modest premium over the standard 8-inch S variant. Fully loaded machines with probing, high-pressure coolant, and expanded tool magazine push toward the higher end.

03 Can I transfer parts from the 10-inch chuck to the 8-inch sub spindle?

Yes, as long as the part's second-end diameter fits within the 8-inch chuck's gripping range. The FANUC control handles synchronized spindle handoffs. Parts that require 10-inch gripping on both ends would need the SMX 2600 S with matched 10-inch chucks.

04 How does the SMX 2100 SB compare to the SMX 2600?

The SMX 2600 has 10-inch chucks on both spindles, 30 kW main spindle power, and 660 mm max turning diameter vs 600 mm on the 2100 SB. The 2100 SB is lighter, more compact, and about $40-60K less expensive — choose it when you only need the 10-inch chuck on the first op.