LAIWEI carbide hole saw 45 mm

What matters most

If you need a clean, larger opening in sheet material, a hole saw is a more suitable approach than widening a small hole with a standard twist drill. This LAIWEI carbide hole saw has a 45 mm cutting diameter and a stated cutting depth of up to 25 mm, so the material’s thickness matters as much as the hole size.

Its carbide-tipped teeth are intended for stainless steel, steel, iron, cast iron, aluminium, copper and wood. The listing identifies K10 carbide and says the tooth count has been increased. It also claims the heat-hardened drill tip raises the average hole count from 30–50 to 80–100. Treat that as a stated estimate, not a guaranteed result: material, speed and feed all affect wear.

How to use it

Match the drilling speed and feed to the material rather than using one setting for every job. Stainless steel has a specific requirement in the listing: use an electric drill or bench drill rated at 700 watts or more, at low speed. That makes the cutter less suited to casual use with an underpowered drill when stainless is the target.

For example, when making a 45 mm opening in a stainless panel, start by confirming the panel is no thicker than the stated 25 mm cutting depth, then work at low speed with suitable equipment. The listing does not provide a universal speed or feed rate, these need to vary with the material. Take care to keep the workpiece stable while cutting.

Practical tips

Choose this cutter when the job calls for a wider hole in one of the listed materials and a conventional twist drill would be the wrong format. It is presented as an alternative to a bi-metal hole saw, with carbide teeth intended for cutting metal as well as wood. That broad material range is useful, but it does not mean one drilling setup will suit every surface.

The main limitation is depth: the stated maximum is 25 mm. Tenants of thicker workpieces or jobs needing a different hole diameter will need another tool. Also, the listing’s claims about cleaner cuts and longer life should be read as product claims rather than assured outcomes. Based on the listing, stainless steel is the most demanding use case because it calls for a 700-watt-or-higher drill and low-speed operation.

It’s a good option if you need a 45 mm opening and already have suitable drilling equipment for the material. It won’t suit you if your work exceeds the stated cutting depth or your stainless-steel setup cannot meet the stated power requirement.

Before you decide

What size hole does it cut? It is described as a 45 mm hole saw.

How deep can it cut? The listed cutting depth is up to 25 mm, so check the workpiece thickness before choosing it.

Can it be used on stainless steel? Stainless steel is among the listed materials, but the listing specifies an electric or bench drill of 700 watts or more and low-speed operation.

For your situation

Choose this LAIWEI cutter when the hole needs to be 45 mm, the material is within its stated range and the work fits within the 25 mm depth limit. If your priority is a general-purpose bit for smaller holes, or you need to cut thicker stock, this is a more specialised choice than the job calls for. The stainless-steel power requirement is worth factoring in before buying, for other materials, the listing gives no single speed setting to rely on.