2100LY CNC Mill-Turn Machine – Pallet-Mounted Turret for 7-10 mm Single-Side Cuts | BONANZA CNC

2100LY CNC Mill-Turn Machine: A Turn-Mill Built Around Rigidity

Turning and milling on one machine saves setups, but only if the machine can actually take a cut. Plenty of mill-turns are lathes first with milling bolted on. The 2100LY from BONANZA is the opposite: the turret bolts straight onto the pallet, the cutting center of gravity sits low, and the tool stays stable doing work a standard lathe would shy away from.

That is not brochure talk. The 2100LY takes single-sided cuts of 7-10 mm in steel-class materials, well beyond what a light-duty turn-mill can manage. Below are the real specs, what they mean on the floor, and where the machine fits the BONANZA mill-turn range.

2100LY Specifications at a Glance

Why the Turret-on-Pallet Layout Is the Real Story

Here is the detail most people skim past: the turret on the 2100LY mounts directly on the pallet, not off a cross slide reaching out over the bed. That changes the geometry of every cut.

When a tool post hangs far from its support, the arm acts like a lever, and under load it flexes into chatter marks and insert wear. Keeping the turret low and close to the center of gravity shortens that lever arm, so the machine stays rigid exactly where cutting happens.

The payoff is the 7-10 mm single-sided cutting depth. Most machines in this size class rough in the 3-4 mm range; taking 7-10 mm in one pass means fewer passes and less time in the cut. That kind of number only comes from a layout engineered for stiffness.

Interpolation Y-Axis: Real Off-Center Milling, Not an Afterthought

The Y in 2100LY stands for a full interpolation Y-axis with ±50 mm of travel. In plain terms, it positions the tool off the centerline under program control and machines features that would normally require a second operation or a machining center.

Take a valve body needing a milled flat, a drilled cross hole, or an off-center keyway. On a plain lathe, that part needs a second machine. On the 2100LY, the Y-axis lets live tooling reach those features in the same clamping, so the datum never moves and tolerances hold. It also handles contours and arcs off the turning centerline.

12-Station Live Tool Turret and a 30/11 kW Spindle

Tool capacity is where turn-mills usually frustrate operators. The 2100LY carries a 12-station live tool turret, so twelve tools can stay in the machine with driven tooling where you need it. A batch needing turning, milling, drilling, and tapping usually runs without a single tool-change interruption.

The spindle deserves a closer look too. BONANZA rates it at 30/11 kW with a 4,500/5,000 r/min range: high power for heavy roughing when you peel 7-10 mm off a blank, and the upper speed band for finishing passes. The A2-6 nose and 65 mm bore keep the front end stiff while passing a useful bar diameter.

What Parts Actually Suit the 2100LY

With 650 mm swing over the bed, 500 mm of cutting length, and a 350 mm cutting diameter, the 2100LY is not a bar-feeder machine for tiny screw parts. It suits components that are chunky, off-center, or both:

• Valves and fittings that need milled faces or cross-drilled ports after turning
• Shafts and rollers with keyways, flats, or drive features cut off-center
• Flanges and rings in steel or cast iron where roughing depth decides cycle time
• Small batch, high-mix work where sending parts to a second machine kills the margin

If your parts are round-only and small, a plain slant bed lathe costs less and does the job. If they need turning plus milling in one clamping, this is the class that removes the second operation.

Where the 2100LY Sits in the BONANZA Mill-Turn Range

BONANZA builds the mill-turn family from compact to heavy; the 2100LY sits at the entry of the Y-axis composite machines with a 4,000 kg weight and a 650 mm swing class. A few neighbors worth comparing:

• QK1322 is the large-bore specialist: an A2-15 spindle with a 240 mm bore and 220 mm bar capacity for long bar work up to 1,350 mm.
• HTMC500T and HTMC800S are machining-center-style turn-mills with 700-720 mm X travel for parts needing heavier milling, not just spot drilling.
• 2100LY fits when your parts stay inside a 350 mm diameter envelope and you want rigid turning with genuine Y-axis milling in one setup.
• TCK3100LY steps up to 750 mm swing and 1,000 mm turning length when parts get longer and batches grow.

Not sure which envelope fits? The answer is usually in your part list, not the brochure. Send BONANZA your typical drawings and they will point you at the right one; the full CNC mill-turn machines series is worth browsing to see the spread.

Shop Floor Notes for Anyone Quoting the 2100LY

A few practical points before you buy. Count your tools honestly: twelve stations cover most jobs, but plan turret loading if your parts need more. The 4,000 kg weight and 3.3 m length suit standard workshop floors; just check door width and forklift capacity before delivery.

Think about chips too. Deep single-side cuts produce serious chip volume, and a chip conveyor is worth the money if you rough steel in any quantity. Way covers and seals keep chips out of the critical areas.

Frequently Asked Questions

What does the 7-10 mm cutting depth actually mean in practice?

It means the 2100LY can take single-sided roughing cuts of 7-10 mm in one pass, thanks to the pallet-mounted turret and low cutting center of gravity. Actual depth depends on material, tooling, and setup.

Is the Y-axis on the 2100LY suitable for full milling work?

The ±50 mm interpolating Y-axis handles off-center milling, drilling, and contouring within the working envelope: flats, keyways, cross holes, and similar features. If your parts are large prismatic components needing heavy milling, the HTMC models with bigger Y travel fit better.

What spindle options are available on the 2100LY?

The standard spindle is an A2-6 nose with a 65 mm bore, 4,500/5,000 r/min speed range, and a 30/11 kW dual-rating motor covering heavy roughing and higher-speed finishing on one spindle. Confirm chuck sizing and bar capacity with BONANZA for your work.

Get a Straight Answer for Your Parts

Spec tables settle the easy questions; the real one is whether the 2100LY fits the parts you actually cut. Send BONANZA your drawings or a list of typical jobs and get a direct recommendation: whether the 2100LY CNC mill-turn machine suits your floor, or whether a QK1322 or an HTMC model makes more sense. Browse the full CNC mill-turn collection or contact the BONANZA team through the website.