What Is the Difference Between a Press Brake and a Shear?
A press brake bends metal. A shear cuts metal. That is the core functional difference. A press brake uses a punch and die to form sheet metal into angles, channels, boxes, and complex bent shapes. A shear uses opposing blades to make straight-line cuts through sheet metal or plate, producing flat blanks from larger stock.
Both machines are foundational equipment in metal fabrication. Most production shops need both, because fabrication workflows almost always require cutting raw material to size (shearing) before forming it into shape (bending). Understanding what each machine does, how they differ mechanically, and when you need one or both is essential for setting up an efficient fab shop.
What Does a Press Brake Do?
A press brake applies force along a narrow line to bend flat sheet metal into a desired angle. The workpiece sits on a lower die (V-block), and a punch descends from above to push the metal into the die opening. The angle of the bend is controlled by how far the punch travels into the die (penetration depth), the die opening width, and the material’s springback characteristics.
Press brakes are used to form:
- 90-degree bends (brackets, flanges, enclosures)
- Acute bends (under 90 degrees)
- Obtuse bends (over 90 degrees)
- Hems (180-degree folds)
- Offsets (Z-bends)
- Channels and U-shapes
- Box shapes (with sequential bends)
Modern CNC press brakes like the Baykal APHS series use programmable back gauges and CNC-controlled ram positioning to produce complex, multi-bend parts with repeatable accuracy across production runs.
What Does a Shear Do?
A shear makes straight-line cuts through sheet metal or plate. The upper blade descends against a fixed lower blade, shearing the material along the cut line. The result is a clean, straight edge without material removal (unlike sawing, plasma cutting, or laser cutting, which remove a kerf).
Shears are used to:
- Cut raw sheet stock into blanks for further processing
- Trim parts to final dimension
- Square up irregular edges on plate
- Produce strips from wide sheet for roll forming or secondary operations
Shears come in three main types: hydraulic swing beam (variable angle, clean cuts on thin gauge), hydraulic guillotine (heavier plate capacity, rigid frame), and mechanical (fastest cycle time for high-volume thin-gauge work). Fab-Line supplies all three types, including the HGL swing beam and HNC guillotine.
Press Brake vs. Shear: Side-by-Side Comparison
| Feature | Press Brake | Shear |
|---|---|---|
| Primary function | Bends metal into shapes | Cuts metal into flat pieces |
| Output | Formed parts (angles, channels, boxes) | Flat blanks (cut to size) |
| Tooling | Punch and die sets | Upper and lower blades |
| Force applied | Along a line (bending force) | Along a line (shearing force) |
| Material removal | None (material is formed, not removed) | None (material is separated, not removed) |
| CNC control | Ram depth, back gauge position, bend angle | Blade gap, back gauge position, cut length |
| Typical tonnage range | 35T to 6,600T+ | 6mm to 25mm capacity (rated by thickness) |
| Workflow position | After cutting (forms the blank) | First operation (cuts the blank) |
| Key accuracy spec | Bend angle (+/-0.5 degrees or better) | Cut straightness and squareness |
When Do You Need Both Machines?
Most fabrication shops need both a shear and a press brake because the standard production workflow follows this sequence:
- Raw material arrives as large sheets (4′ x 8′, 5′ x 10′, or coil)
- Shear cuts blanks to the dimensions required for each part
- Press brake forms blanks into finished shapes through one or more bends
- Secondary operations (welding, hardware, finishing) complete the part
A shop that only has a press brake must buy pre-cut blanks or use slower cutting methods (band saw, plasma, laser). A shop that only has a shear can produce flat parts but cannot form any bent shapes. The combination of shear + press brake is the minimum viable equipment set for a general-purpose sheet metal fabrication operation.
Can One Machine Replace the Other?
No. A press brake cannot cut metal, and a shear cannot bend metal. They perform fundamentally different operations. Some fabricators attempt to use a press brake with a cutting attachment for light shearing, but this is limited to thin gauge and short lengths. It does not replace a dedicated shear for production cutting.
Similarly, some shops use laser cutting or plasma cutting instead of a shear for blank preparation. While this works (and adds contour cutting capability), dedicated shears are faster and more cost-effective for straight-line cutting of rectangular blanks.
How to Size Each Machine for Your Shop
Sizing a Press Brake
Press brake sizing depends on three factors: the tonnage required for your thickest material and tightest bend, the bed length needed for your longest part, and the CNC controller complexity your parts demand. A typical general-purpose fabrication shop starts with an 80T to 160T press brake with an 8′ to 10′ bed. For detailed guidance, see Fab-Line’s press brake buyer’s guide.
Sizing a Shear
Shear sizing depends on the maximum material thickness you need to cut and the maximum sheet width. A 1/4″ x 10′ hydraulic shear handles most sheet metal work. Shops cutting heavier plate (3/8″ to 1/2″) need a guillotine shear with higher capacity. For high-volume thin-gauge work (10-16 gauge), a mechanical shear delivers the fastest cycle times.
Typical Shop Equipment Setups
| Shop Type | Shear | Press Brake | Notes |
|---|---|---|---|
| Small job shop | 1/4″ x 8′ hydraulic swing beam | 80T-100T x 8′ CNC | Covers most general fab work |
| HVAC fabricator | 16-gauge mechanical shear | 60T-80T x 10′ CNC | High volume, thin gauge, long parts |
| Structural steel shop | 1/2″ x 10′ hydraulic guillotine | 200T-300T x 12′ CNC | Heavy plate, larger parts |
| Precision sheet metal | 1/4″ x 10′ CNC swing beam | 100T-135T x 10′ CNC (electric) | Tight tolerances, clean edges |
| Full-service production | Both swing beam and guillotine | Multiple press brakes (light + heavy) | Separate machines for different gauge ranges |
Frequently Asked Questions
Is a press brake the same as a shear?
No. A press brake bends sheet metal into angles and shapes. A shear cuts sheet metal into flat pieces. They perform different operations and are used at different stages of the fabrication process.
Which machine should a new fabrication shop buy first?
Most shops benefit from buying both at the same time, since you need to cut blanks (shear) before forming them (press brake). If you must choose one first, the press brake is typically the higher-priority machine because you can outsource blank cutting or use a plasma table, but you cannot outsource bending cost-effectively at volume.
Can a laser cutter replace a shear?
A laser cutter can perform the same blank cutting function as a shear and adds the ability to cut complex contours. However, for straight-line cutting of rectangular blanks, a shear is faster and has lower operating cost per cut. Many shops use both: a shear for rectangular blanks and a laser for contoured parts.
What is the typical cost difference between a press brake and a shear?
CNC press brakes generally cost more than shears of comparable capacity because they require more complex CNC control, precision ram positioning, and tooling. A 100T CNC press brake typically costs 1.5x to 2x what a comparable-capacity hydraulic shear costs. Exact pricing depends on configuration. Contact Fab-Line for current pricing on both.
Do I need a CNC shear, or is manual enough?
For production work with repeat cut sizes, a CNC back gauge shear significantly reduces setup time and improves consistency. For low-volume job shop work with constantly changing dimensions, a manual back gauge may be sufficient. The price difference between manual and CNC back gauge is relatively small compared to the productivity gain on repeat work.
Find the Right Equipment for Your Shop
Fab-Line Machinery supplies both press brakes and hydraulic shears from US warehouse inventory. Whether you are setting up a new fabrication shop or upgrading existing equipment, our technical team can help match machine specifications to your material, thickness, and production volume requirements.