How to Build Your First Tinkers' Construct Tool
Gather Parts and Build the Tool
Start by making a Blank Sand Cast, Blank Red Sand Cast, or Blank Gold Cast. Use the part builder recipes to turn these into the specific part casts you need: Pickaxe Head, Tool Rod, Small Binding, Broad Axe Head, Adze Head, Broad Blade, Bow Limb, Bow Grip, and so on. Each part type has its own cast variant (for example Adze Head Sand Cast, Broad Axe Head Red Sand Cast, Bow Limb Gold Cast).
Once you have casts, use the part_builder and item_part_builder recipes to produce the actual parts from valid materials. Then use the tool_building recipe to assemble them into a finished tool. The exact combination depends on the tool: a broad axe needs a Broad Axe Head plus a Tool Rod and Small Binding; a bow needs Bow Limb, Bow Grip, and Bowstring.
Upgrade with Modifiers
After the tool exists, apply modifiers using tconstruct:modifier and tconstruct:incremental_modifier recipes. These consume the relevant modifier items and upgrade slots on the tool. Useful early modifiers include Reinforced, Haste, Luck, Sharpness, and Diamond-style upgrades. Incremental modifiers can be applied in multiple steps, so you can top up a tool over time rather than all at once.
If you need to change a part later, rebuild the tool at the tool station using the same tool_building recipe with the new part. Keep your casts — they are reusable and let you mass-produce parts for multiple tools.