Creudy Casnewydd / Newport Makerspace Wiki

The Clarke SBR760B is a versatile bench-mounted machine located in the Metalworking Room. It combines three essential sheet metal functions—Shearing, Bending (Braking), and Rolling—into a single compact unit. It is ideal for prototyping and small-scale fabrication using mild steel, aluminum, and brass.

Machine Specifications

• Maximum Working Width: 760 mm (30“)
• Maximum Thickness (Mild Steel): 1.0 mm (20 Gauge)
• Maximum Thickness (Aluminum/Copper): 1.2 mm
• Minimum Rolling Diameter: 38 mm
• Shear Bed Size: 760 mm x 400 mm
• Brake Fingers: Segmented (Removable for box/pan folding)

Link to product page

Shearing (Cutting)

1. Clear the Bed: Ensure no offcuts are near the blade.
2. Position Material: Place the sheet on the table and align it with the cutting edge or the back gauge.
3. Secure the Work: Use the built-in hold-down clamp to prevent the metal from tipping or sliding during the cut.
4. The Cut: Pull the handles forward in a smooth, continuous motion. Do not “bounce” the handles.

Bending (Press Brake)

1. Select Fingers: For box making, remove the segmented fingers that fall outside your bend line.
2. Mark Your Line: Scribe the bend line clearly on your workpiece.
3. Align: Slide the metal under the fingers and align the scribe mark with the tip of the brake fingers.
4. Bend: Raise the handles to the desired angle. Account for “spring-back” by bending slightly past the target angle.

Rolling (Slip Roll)

1. Adjust Rollers: Use the side adjustment screws to set the gap between the primary rollers based on material thickness.
2. Set Radius: Adjust the rear (forming) roller to determine the tightness of the curve.
3. Feed: Insert the leading edge of the metal and rotate the handles.
4. Incremental Passes: For tight cylinders, perform multiple passes, tightening the rear roller slightly each time rather than forcing it in one go.

Risk Score Amber

Risk Assessment: link

Do I need an induction to use this machine? Yes

Can I use this machine while lone working? Yes

• Pinch Points: The rollers, brake fingers, and shear blade create severe crush and pinch hazards. Keep fingers at least 5cm away from the working area.
• Sharp Edges: Freshly sheared metal is extremely sharp. Always deburr edges after cutting.
• Overloading: Attempting to process material thicker than 1.0mm (mild steel) will damage the blades and rollers. NEVER use cheater bars or extensions on the handles.
• Stability: Ensure the workpiece is properly supported, especially when working with full 760mm wide sheets.

Do I need an induction to use this machine?: Yes

• You can get an induction for this machine by submitting a request to contact@newportmakerspace.org, or by completing this google form
• An induction for this machine is expected to take up to 30 minutes
• The induction will cover setup and safe usage of the machine

Date next maintenance is due: 01/04/2026