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Anyang STH-25 power hammer between STH-15 and STH-40 two models.

Thanks, Mr. Doobs for making a video to share his feeling about the 25KG power hammer made by Anyang ST, please click it to watch.

Anyang ST 25KG power hammer unloading and review by UK user.

15kg power hammer will be good choice for a blacksmith beginner.

25kg power hammer

The hit energy (P) figures are a mathematical representation that was arrived at by comparing the speed（V）and weight of the ram(M), P=1/2*M*V². Besides that Anvil weight also is very important for forging efficiency, because it will decide how much energy losing when forging. that’s why a hammer of a given size will forge with more force against a heavier anvil compared with a hammer that has a lighter anvil.

• Anyang ST increases anvil weight. Anyang ST hammer became thicker and thicker, ST power hammer is one piece casting hammer that anvil together with the frame, so it will bring anvil weight heavier and heavier, then will help reduce hit energy losing.
• Anyang ST tries to make the stroke longer and longer, it not only can allow big bars but also can supply enough glide distance to make the top die get higher speed when forging, the speed (V) is one very important item for hit energy. Anyang ST hammers hit harder than other hammers.
• Anyang ST improves the finish of the machined surface, it will reduce friction that makes the ram move more quickly and reduce running temperature.
• Anyang ST hammer frame is casting, the overall rigidity will better than a fabricated self-contained hammer(over 20-30%) or mechanical hammer or the same weight(over 2-3 times).

Good video to show how to grease your Anyang st hammers when you receive them, enough grease will pro-long Anyang hammer working life.

This video is made by Anyang ST dealer in the UK – Mr.Nigel. Good introduction and demonstration in English.