Estimate the weight of worn solid carbide tools from diameter and length, add inserts by weight, and multiply by the price per kg or lb your scrap buyer quotes. The same weight shows what a weight-based raw-material surcharge adds to each new tool.
Enter at least one row of tools, inserts or a known weight.
One tool, weighed as a full cylinder. The share ground away is not applied here.
Each tool is taken as a cylinder with the diameter d and the total length l. The weight of that blank is the volume times the density, and the scrap weight adds the inserts by their own weight:
We convert with 1 in = 25.4 mm and 1 lb = 0.45359237 kg. A known weight replaces the dimension estimate of the tool rows; inserts are added on top.
Tungsten carbide is 15.7 g/cm3 and cobalt 8.9 g/cm3 (Hyperion Materials & Technologies, density per ISO 3369). Mixed by weight that gives about 15.0 g/cm3 at 6 percent cobalt and 14.1 g/cm3 at 15 percent. The field starts at 14.5; use the value on your supplier's grade sheet if you have it. (Source)
One German tool supplier publishes its rate: 225 EUR per kg of carbide from 1 May 2026 and 255 EUR per kg from 1 June 2026. At 255 EUR per kg a 10 x 100 mm blank carries about 29 EUR of surcharge. Checked 13 November 2026. (Source)
Treat each tool as a cylinder: weight = pi / 4 x diameter squared x length x density. At a density of 14.5 g/cm3 a 10 x 100 mm tool comes to about 114 g. Flutes and relief remove part of that, so a real tool weighs less. Weigh a batch and use the known weight when you can.
The price per kg or per lb your scrap buyer quotes you for exactly the material you have. Clean solid carbide, brazed tools and mixed lots are priced differently, and a quote follows the market and is valid for the day it was given. The page carries no price of its own.
The surcharge per tool is the blank weight times the rate per kg or lb. The page also works backwards: enter the surcharge shown on an invoice and the weight of the blank gives the implied rate per kg or lb.
This page turns tool dimensions and a quoted price into a scrap value and an implied surcharge rate. Which tool type and grade suit your material, and what a regrind or a second source changes, is the advisor's job, grounded in catalog data and brand-neutral.