Hole Saw / Otwornica M.K. Morse Advanced Bi-Metal 37 mm (1-7/16")

The M.K. Morse Advanced Bi-Metal hole saw 37 mm (1-7/16") is a circular cutting tool engineered for punching clean holes through a variety of materials. It combines a high-speed steel (HSS) cutting edge with a resilient backing to improve longevity and heat resistance during prolonged or aggressive cutting. The design accommodates a compatible arbor and is intended for professional and DIY applications where precise round openings are required.

Advantages

The bi-metal construction provides a balance between hardness and flexibility, reducing the risk of tooth breakage while maintaining sharpness for metal, wood and composite cuts. Heat-resistant properties extend life under continuous use, and the 37 mm diameter delivers consistent, repeatable hole sizes. The saw’s teeth geometry is optimized to cut efficiently across different materials with lower vibration and cleaner edges.

Suitable for

• Cutting round holes in thin and medium-thickness metal sheets
• Create openings in wood and plywood for wiring or fixtures
• Installing HVAC ducts, plumbing penetrations and electrical boxes
• Work on composite panels and non-ferrous metals

Key specifications

• Diameter: 37 mm (1-7/16")
• Material: Bi-metal (HSS cutting edge with flexible backing)
• Intended use: Metal, wood, composites
• Compatibility: Requires compatible arbor for attachment
• Cut type: Circular through-holes

How to use

Secure the appropriate arbor in the drill chuck and mount the hole saw onto the arbor according to the arbor manufacturer’s instructions. Mark the centre point of the hole on the workpiece and, if needed, drill a pilot hole before starting. Begin cutting at moderate speed, applying steady pressure and allowing the saw to do the work; reduce speed and back off periodically when cutting metal to manage heat build-up. After cutting, retract the saw and remove the workpiece; deburr the edge if required for a clean finish.

Usage recommendations

Use cutting lubricant when working with steel and other ferrous metals to extend blade life and improve cut quality. Match drill speed and feed pressure to the material: higher speeds for wood and lower speeds with firm feed for metals. Inspect teeth before use and replace the saw if significant wear or tooth damage is visible. For safety, secure the workpiece and wear eye protection, gloves and appropriate PPE.