Re-tipping your swingblade.

Written on 08/04/2017

Every 8000-16000bf you will most likely need to re-tip your blade. You can send the blade off to your nearest saw doctor. This can take a little time; it can be a pain having to wait for these blades to get done.

Turbosawmill offers a simple re-tipping jig allowing you to braze them on yourself. The complete process should only take 10-20 minutes to do provided you have an oxy set.

Brazing rods need to contain 50% or more silver. You also need high temperature flux.

Place the blade in a vice and attach the jig.

Use a new blade to setup the tip holster (or align carefully for the first time).

Heat and remove the old or shattered tip using pliers then wire brush clean while it’s still hot.

Bring the captured tooth to rest 6mm or 1/4" off the tip holster.

Heat both the tip and the blade holster.

Heat the brazing rod and dip it into the flux.

Tin the holster face so the brazing melts on to it.

Once again heat the tip and the blade.

While heating; with gloves bring the tooth to contact the tip holster.

Heat until the brazing melts all around, fusing both elements.

Let cool down, remove, and relocate the jig for the next tooth - repeat the process.

Brazing info;

BAg-3, AMS 4771, AG 351, Easy-Flo 3, Silvaloy 50N, Mattibraze 50N. For 300-series stainless steel. For joining tungsten carbide, beryllium copper and aluminum bronze to steel. Introduced as a replacement of BAg-1a due to its increased corrosion resistance in certain conditions. Resistant to chloride corrosion. Used in marine applications. Used in dairy equipment exposed to strong chlorine-based cleaning solutions. Used extensively for brazing tungsten carbide tips on woodcutting, metal cutting and mining tools. Recommended for aluminum bronze as the nickel content offsets the detrimental effect of aluminum diffusion. Mushy during melting, most volume melts at the higher end of melting range. Can be used to shape fillets and to bridge large gaps. Fillets may be used for bridging large gaps or for distributing stresses in the assembly. Tendency to liquation. Light yellow color. Maximum service temperature 204 °C (intermittently 316 °C). Gap 0.1–0.25 mm. Cadmium-free alternative is BAg-24.


NOTE: These alloys contain Cadmium. Cadmium fumes are toxic, and as a result, these materials should only be used in well-ventilated areas.