===== Clarke SBR760B 3 in 1 Sheet Metal Machine =====

{{:equipment:images:metalbreak.jpg?400|}}

==== Overview ====

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)

[[https://www.clarkeinternational.com/p/clarke-sbr760b-3-in-1-sheet-metal-machine-760m/|Link to product page]]

===== Operating Instructions =====

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

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

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

----

==== Safety & Induction ====

:!: Risk Score **Amber**

:!: Risk Assessment: {{ :equipment:risk_assessments:nmcc_-_risk_assessment_-_metal_brake_-_20.05.2025.docx |link}}

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

:!: Can I use this machine while lone working? **Yes**

^ PPE      ^ Required / Suggested / Banned      ^
|Eye protection|Required|
|Hearing protection|N/A|
|Gloves|Required|

=== Specific Hazards ===
  * **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.

=== Induction Information ===

:!: 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 [[https://forms.gle/bCzqRAGGd8Da9bwJ8|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

==== Maintenance History ====

Date next maintenance is due: **01/04/2026**

^ Date      ^ Member ID      ^ Notes          ^
| 01/10/2025 | James B | Rollers and blades checked |
|  |  |  |
|  |  |  |