How to choose a 5-axis CNC bridge saw

Start from the parts, not the machine

Write down what your shop cut in the last three months: how many kitchen jobs, how many mitered edges, how much cladding and flooring, which materials. A shop doing mostly kitchen countertops in granite and engineered quartz needs a different configuration from a shop that sells mitered edges in porcelain / sintered stone or cuts cladding and flooring in volume.

Three questions decide most of the specification:

• Do you need inclined and variable-bevel cuts, or only straight and 45° miter cuts? If only the latter, read 4-axis vs 5-axis bridge saw before you pay for a fifth interpolated axis.
• Will the saw also do sink cutouts, cooktop cutouts and core drilling, or does a CNC router or waterjet do that work? See bridge saw vs saw-waterjet vs CNC router.
• Who loads and unloads, and how many people does that take today?

Monoblock or wall / shoulder installation

A monoblock bridge saw carries the bridge on its own steel frame. It goes on a level concrete floor, can be moved later, and needs no civil works beyond anchoring. A wall or shoulder machine runs its bridge on concrete walls or steel shoulders built on site. CMS, for example, lists its Brembana Sprint as an open-frame machine installed on concrete or carpentry shoulders, with a Y stroke from 2,550 mm up to 7,200 mm depending on the version.

Monoblock suits most countertop shops and rented buildings. Shoulder installation makes sense when you need a long Y stroke for large-format cladding, two worktables under one bridge, or you own the building and plan to stay.

Strokes, worktable and slab sizes

Compare the strokes with the slabs you actually buy, not the slabs you see at trade fairs. Typical figures for this class are an X stroke of 3,300 to 4,250 mm and a Y stroke of 2,450 to 3,300 mm on monoblock machines.

• Jumbo quartz and porcelain slabs run near 3,200 × 1,600 mm (126 × 63 in) and larger. Check that the full slab fits on the worktable with room for the blade to exit the cut at both ends.
• The blade needs overtravel. A worktable that is exactly slab-sized leaves no margin at the corners.
• Z stroke matters for thick blocks, step cutting and tall tool holders on the spindle side. 400 mm is enough for slab work. 600 to 900 mm is for block and solid work.

Blade diameter and cutting depth at 90° and 45°

Cutting depth always comes with a blade diameter and an angle. A common reference point: with a Ø625 mm (24.6 in) blade, CMS states 200 mm (7.9 in) at 90° and 130 mm (5.1 in) at 45°. If you cut 20 to 30 mm slabs only, a smaller blade is cheaper to buy and runs with less vibration. If you cut 60 mm laminated edges at 45°, or solid steps and sills, check the 45° figure, not the 90° one.

Ask which blade sizes the arbor and guard accept, and whether a different flange is needed for thin porcelain blades.

C-axis and A-axis ranges

• C-axis head rotation: 0 to 360° is the minimum. Ranges up to 540° (CMS lists ±270°) let the head finish a contour without unwinding the cable and hose chain mid-program.
• A-axis head tilt: 0 to 90° is standard on 5-axis machines. Some heads tilt a few degrees past vertical (CMS lists +8° to -90°), which helps with undercuts and drip grooves.

True 5-axis interpolation vs indexed tilt

This is the point most often blurred in listings. On a machine with 5 interpolated axes, the CNC moves X, Y, Z, C and A together, so the tilt angle can change along the cut. On a machine with 4 interpolated axes plus indexed tilt, the head is set to an angle and locked, then the cut runs with the tilt fixed. Breton, for example, offers its Smart Cut range with either 0° and 45° tilt or full 0 to 90° tilt depending on the option.

Indexed tilt is enough for 45° miter cuts and fixed bevels. Variable bevels, shaped cuts and 3D work need interpolation. Ask the seller to state the number of interpolated axes in writing and to run a variable-bevel program at the cutting test.

Blade motor power and duty rating

Motor power is usually 11 to 26 kW (15 to 36 HP) in this class. Compare the duty rating, not only the number: an S1 rating means continuous duty, S6 means continuous operation with intermittent load, and S6 figures read higher than S1 for the same motor. Ask for the rpm range and whether the motor is inverter-driven. Variable speed matters when you switch between granite, quartzite, marble and porcelain.

Electrospindle and tool changer

An electrospindle turns the saw into a light machining center: core drilling for faucet holes, sink cutouts with a finger bit, drainboard grooves and some edge profiling. Check the taper (ISO 40 is common), the rpm (8,000 to 10,000 rpm is typical), center water feed, and the number of tool changer positions. Four positions cover core bit, finger bit and a grooving tool. More positions matter if you plan to polish on the machine.

The spindle does not replace a CNC router for full edge profiling at volume. It removes a handling step for cutouts.

Vacuum manipulator and tilting table

A vacuum manipulator lifts cut pieces with the head and moves them clear of the slab, so the next cut can run without an operator in the working area. Ask for the lifting capacity (around 500 kg is typical) and whether the software can plan picks automatically after nesting.

A hydraulic tilting table (used listings show 0 to 85°) lets one operator load a slab from an A-frame with a clamp and crane. Without it you need a vacuum lifter and enough crane height over the worktable.

Camera and slab photo layout

A digital camera over the worktable photographs the slab so the operator can place parts on the image, avoid fissures and do vein matching. Check the camera resolution, how the image is color-corrected, and whether the layout can be exported to your office software. For high-value quartzite and marble, this is often the option that pays back first through yield.

Control platform and software

• Control: ask which CNC brand runs the machine (Siemens, Fagor, Fanuc and others), and whether a local technician in your country knows it.
• File import: DXF import is the minimum. Check how layers and arcs are handled.
• CAM: on-board CAM for simple jobs, plus offline programming in the office so the saw keeps cutting while the next job is drawn. Check licence count and annual fees.
• Nesting: automatic nesting with grain direction and vein matching.

Service, spare parts and teleservice

Ask for a written list of wear and electrical parts held in stock, with lead times to your country. Ask how teleservice connects (VPN router, which port, who controls access) and what it costs after the warranty. A machine built on a control and drive brand that local technicians already service will cost less to keep running.

Installation requirements

• Power: 400 V / 50 Hz in Europe and much of the world; 480 V / 60 Hz in the US. Check the connected load in kVA and the cable size.
• Water: 15 to 40 l/min at 3 bar is typical. Plan a recycling or settling system for slurry. Wet cutting is also your main silica dust control.
• Air: 6 bar, with higher consumption when vacuum cups run.
• Floor: get the foundation drawing before the building work starts. Check anchoring points, slab thickness and crane clearance.

Compliance documents

• EU and EFTA: CE marking and an EU Declaration of Conformity. Regulation (EU) 2023/1230 replaces Directive 2006/42/EC and applies from 20 January 2027, with no transition period. See EU Machinery Regulation 2023/1230 and /compliance/.
• US: CE is not accepted as such. The machine electrical equipment is generally assessed to NFPA 79, and control panels are commonly built and listed to UL 508A. Your local authority having jurisdiction decides what it accepts. Confirm before order.
• Ask for the instruction manual, wiring diagrams and spare parts list in your language.

Factory visit, cutting test and FAT

Visit the factory if you can. Bring your own slab and a DXF of a real job. Watch a miter cut, a variable-bevel cut and a sink cutout, and measure the parts. Agree on a factory acceptance test (FAT) protocol in the contract: tolerances, test parts and who signs off. See factory visit.

Checklist

Item	What to check
Application fit	Parts mix, materials, need for variable bevels and cutouts
Structure	Monoblock or wall / shoulder installation
Strokes	X, Y, Z vs your largest slab plus blade overtravel
Worktable	Size vs jumbo slabs; tilting table option
Blade	Max diameter; cutting depth at 90° and at 45°
C-axis	Rotation range (360° minimum, up to 540°)
A-axis	Tilt range; interpolated or indexed
Interpolation	Number of interpolated axes stated in writing
Blade motor	kW (HP), S1 or S6 rating, rpm range, inverter
Electrospindle	Taper, rpm, center water feed, tool changer positions
Handling	Vacuum manipulator capacity, automatic pick planning
Camera	Slab photo layout, vein matching, export
Control	CNC brand, local service knowledge
Software	DXF import, on-board CAM, offline programming, licence fees
Service	Spare parts stock, lead times, teleservice terms
Power	400 V / 50 Hz or 480 V / 60 Hz, connected load
Water and air	l/min at 3 bar, recycling system, 6 bar air
Floor	Foundation drawing, anchoring, crane clearance
Compliance	CE and EU DoC (2023/1230 from 20 Jan 2027); NFPA 79 / UL 508A for US
Acceptance	Factory visit, cutting test on your slab, FAT protocol

Next step

Compare this checklist with the specification table on the 5-axis CNC bridge saw page, then send your parts mix and slab sizes through request a configuration.