Which metal sawing method delivers the cleanest cut at the best price? The answer depends on material, cross-section and tolerance.
As a precision engineering and CNC manufacturer in Werl, Vulcanus saws blocks, rings and hardened steels daily.
This guide compares the key metal sawing methods under DIN 8589-6. It helps buyers and engineers choose the right process.
Key Takeaways
- DIN 8589-6 defines three industrially relevant metal sawing methods: band sawing, circular sawing and reciprocating sawing.
- Band saws cut large cross-sections with a narrow kerf and little material loss.
- Circular saws are the fastest and offer the best length accuracy on smaller cross-sections.
- Power hacksaws are slow but robust and low-cost for single cuts in difficult materials.
- The right choice depends on material, cross-section, tolerance, batch size and downstream machining.
Metal Sawing Methods Classified Under DIN 8589-6
Under DIN 8580, sawing belongs to the main group of separating processes. Within it, sawing counts as cutting with a geometrically defined edge. DIN 8589-6 then divides it into individual methods.
Our guide to the types of manufacturing processes shows where sawing fits in the bigger picture.
What Sets Sawing Apart From Other Cutting Processes
In sawing, a multi-tooth tool with a narrow cutting width removes material. Each tooth takes a small chip. The result is a cold cut with almost no heat input.
That is the key difference from thermal processes such as laser or plasma cutting. Those create a heat-affected zone that alters the microstructure at the cut edge.
The Three Core Methods at a Glance
Three methods matter most in industrial metalworking:
- Band sawing: straight, continuous cutting motion with an endless saw band
- Circular sawing: rotary cutting motion with a spinning saw blade
- Reciprocating sawing (power hacksaw): a straight blade moving back and forth
Chain saws, frame saws and jigsaws play almost no role in industrial metal cutting. We therefore leave them out here.
Band Saws: The Most Versatile Sawing Method
How a Metal Band Saw Works
An endless welded saw band runs over two wheels. It moves continuously in one direction. The feed runs at right angles to the cutting motion.
The band is thin. This keeps the kerf narrow and material loss low. Bi-metal bands are standard for structural steel, carbide-tipped bands for hardened materials.
Horizontal and Vertical Band Saws
Horizontal band saws are the standard for cutting bar stock and profiles. They often run automatically and can cut bundled material in layers.
Vertical band saws and block band saws split large blocks, plates and forgings. They also handle contour cuts and segmenting.
Band Saw Strengths
- Large cutting capacity on a relatively compact machine
- Narrow kerf and therefore little waste
- Quiet operation without sparks
- Suitable for solid material, profiles and bundle cuts
Band Saw Limitations
The thin band can drift or bind when the material is under stress. The cut surface is rougher than with a circular saw. For tight tolerances, engineers therefore usually plan a machining allowance.
Circular Saws: Fast and Dimensionally Accurate
How a Metal Circular Saw Works
A rotating circular blade performs the cutting motion. Blades are typically HSS or fitted with carbide segments. The stiff blade produces a straight, repeatable cut.
Cold Saws and High-Performance Circular Saws
Classic cold saws run at low speed with plenty of coolant. High-performance machines with carbide blades cut much faster. The right cutting speed depends on the material.
Circular Saw Strengths
- Highest cutting rate on bars, tubes and profiles
- Excellent squareness and surface finish
- Precise mitre cuts
- Ideal for high volumes in series cutting
Circular Saw Limitations
Blade diameter limits the maximum cross-section. The kerf is wider than with a band saw. Large blades also mean higher tooling costs.
Power Hacksaws: Robust for Special Cases
How a Power Hacksaw Works
A power hacksaw moves a straight blade back and forth. On the return stroke, the blade lifts off the workpiece. Only the forward stroke removes material.
When a Power Hacksaw Makes Sense
The method is slower than band or circular sawing. However, it is robust, inexpensive and easy to operate. For single cuts in hard materials, it remains an option.
In series production, the band saw has largely replaced the power hacksaw.
Choosing the Right Saw Band and Tooth Pitch
The tool matters as much as the machine. Two factors are central: tooth pitch and tooth material.
Tooth Pitch by Cross-Section
Tooth pitch describes how many teeth sit on one inch of band. Thin-walled tubes and profiles need a fine pitch. Solid material requires a coarse pitch with plenty of chip space.
Variable tooth pitches dampen vibration. They are therefore common for changing cross-sections and bundle cuts.
Tooth Material by Hardness
- Bi-metal with HSS teeth: standard for structural steel, aluminium and many stainless steels
- Carbide-tipped: for high-alloy, hardened and abrasive materials
- Special bands: for tungsten, nickel-based alloys and other hard-to-machine materials
Special Methods: Hard Sawing, Contour Sawing and Segmenting
Beyond the core methods, there are specialised applications. They require dedicated machines and deep process knowledge.
Hard Sawing
Hard sawing cuts materials that have already undergone heat treatment. It needs carbide-tipped bands, low cutting speeds and rigid machines. With this setup, materials up to around 65 HRC can be sawn.
Contour Sawing and Segmenting
In contour sawing, the band follows a profile instead of a straight line. In segmenting, large rings or components are split into segments. Both save material compared with milling from solid.
Metal Sawing Methods Compared
The table below summarises typical reference values. Actual results depend heavily on machine, tool and material.
| Criterion | Band saw | Circular saw | Power hacksaw |
| Cutting motion | continuous, straight | continuous, rotary | reciprocating |
| Max. cross-section | very large | limited by blade diameter | medium |
| Cutting rate | medium | high | low |
| Length accuracy (reference) | approx. 0.2 to 0.3 mm | approx. 0.15 to 0.2 mm | approx. 0.2 to 0.25 mm |
| Kerf | narrow | wider | narrow |
| Typical use | blocks, solid stock, bundles | bars, tubes, profiles in series | single cuts, hard materials |
How precise a cut is in practice is covered in our article on cut-to-length tolerances.
How to Choose the Right Sawing Method
Five criteria decide which method fits. Clarifying them early avoids rework and unnecessary cost.
1. Material and Hardness
Structural steel and aluminium can be cut with almost any method. Stainless steel, tool steel and special alloys place higher demands on band and machine. Your CNC material selection therefore already affects cutting costs.
2. Cross-Section and Dimensions
Large blocks and diameters clearly favour the band saw. Circular saws cut bars and profiles with small cross-sections faster. Very long parts need horizontal saws with long material supports.
3. Tolerance and Surface
Tight length tolerances and clean cut faces favour the circular saw. If the part will be machined anyway, a band saw cut is often enough. What counts is the required manufacturing tolerance on the finished part.
The surface roughness of the cut face also plays a role. It determines whether rework is needed.
4. Batch Size
For series work, automatic circular or band saws with bar loaders pay off. For single parts and large blocks, flexibility matters more than cycle time.
Our guide on how CNC quotes are calculated shows how cutting and setup feed into the price.
5. Downstream Machining
Almost every saw cut is the first step in a longer process chain. An accurate cut shortens the subsequent CNC milling and turning. This helps reduce per-part cost without sacrificing quality.
Sawing or Thermal Cutting?
Laser, plasma and flame cutting are often faster on sheet metal. On thick cross-sections, however, they reach their limits. They also change the microstructure at the cut edge.
Sawing remains the first choice for solid stock and hardened materials. This applies especially to parts that go on to precision machining.
A cold saw cut preserves the material properties right up to the cut edge.
Common Metal Sawing Mistakes to Avoid
Many cutting problems have simple causes:
- Wrong tooth pitch: several teeth should always be engaged at the same time.
- Excessive feed: the band drifts and the cut runs out of square.
- Missing cooling: without suitable coolant lubricants, the tool wears faster.
- Poor clamping: the workpiece vibrates and the cut face becomes rough.
- Worn saw band: dull teeth increase cutting forces and scrap.
Whether dry machining vs wet machining is the better fit depends on material and sawing method.
Sawing at Vulcanus: Large Cross-Sections, Hard Materials
Vulcanus-Stahl & Maschinenbau in Werl saws where standard cutting reaches its limits. Our sawing capacity is built for large, heavy and hard components.
- Vertical sawing: cutting lengths up to 3,800 mm and heights up to 600 mm
- Horizontal sawing: lengths up to 20,000 mm and diameters up to 580 mm
- Hard sawing: hardened materials up to 65 HRC, tungsten and special alloys
- Segmenting and contour sawing: rings up to 2,200 mm diameter and complex profiles
For us, cutting is never an isolated step. On request, we mill, turn and weld the sawn parts in-house. Learn more on our industrial sawing services page.
This process chain is proven on heavy parts too, as our article on CNC machining for large parts shows. If you plan to outsource production, see our guide to CNC contract manufacturing.
The Right Metal Sawing Method Saves Cost at Every Stage
Band saws, circular saws and power hacksaws each have clear strengths. The band saw excels on large cross-sections, the circular saw on speed and accuracy. The power hacksaw remains a robust option for special cases.
What matters is the whole process chain. A well-matched cut reduces stock allowance, machine time and scrap. To find the right partner, read how to choose a CNC machining supplier.
Planning to cut large blocks, rings or hardened material? Contact Vulcanus for a technical assessment and a no-obligation quote.
FAQ: Metal Sawing Methods
What metal sawing methods are there?
DIN 8589-6 mainly distinguishes band sawing, circular sawing and reciprocating sawing such as the power hacksaw. Band and circular saws dominate industrial cutting.
Band saw or circular saw: which is better for metal?
It depends on the part. Band saws suit large cross-sections and blocks. Circular saws are faster and more accurate on bars and profiles.
How accurate is a saw cut in metal?
Typical length accuracy is around 0.15 to 0.3 mm, depending on the method. Tighter tolerances require subsequent milling or turning.
Can hardened steel be sawn?
Yes, with carbide-tipped bands and adapted cutting parameters. Specialised shops saw materials up to around 65 HRC.
Why is sawing often better than flame cutting?
Sawing is a cold process with no heat-affected zone. The microstructure at the cut edge stays unchanged. On thick cross-sections, material loss is also lower.
When does it make sense to outsource metal cutting?
Whenever cross-section, material or batch size exceed your own saw. A supplier with downstream machining also delivers ready-to-install parts from one source.