All three are autolearn recipes learned at mechanics 6 (tread1) and 7 (tread2 and tread3).
\data\mods\blazemod\blaze_other_recipes.json
{
"result": "tread1",
"type": "recipe",
"category": "CC_OTHER",
"subcategory": "CSC_OTHER_MATERIALS",
"skill_used": "fabrication",
"difficulty": 6,
"skills_required": [ "mechanics", 6 ],
"time": 420000,
"autolearn": true,
"using": [ [ "forging_standard", 10 ], [ "steel_standard", 10 ] ],
"qualities": [
{ "id": "HAMMER", "level": 3 },
{ "id": "CUT", "level": 1 },
{ "id": "CHISEL", "level": 3 }
],
"tools": [
[ [ "tongs", -1 ] ],
[ [ "anvil", -1 ] ],
[ [ "swage", -1 ] ]
],
"components": [
[ [ "wire", 20 ] ],
[ [ "plastic_chunk", 200 ] ],
[ [ "chain", 6 ] ]
]
},
{
"result": "tread2",
"type": "recipe",
"category": "CC_OTHER",
"subcategory": "CSC_OTHER_MATERIALS",
"skill_used": "fabrication",
"difficulty": 7,
"skills_required": [ "mechanics", 7 ],
"time": 520000,
"autolearn": true,
"using": [ [ "forging_standard", 15 ], [ "steel_standard", 15 ] ],
"qualities": [
{ "id": "HAMMER", "level": 3 },
{ "id": "CUT", "level": 1 },
{ "id": "CHISEL", "level": 3 }
],
"tools": [
[ [ "tongs", -1 ] ],
[ [ "anvil", -1 ] ],
[ [ "swage", -1 ] ]
],
"components": [
[ [ "steel_plate", 10 ] ],
[ [ "chain", 6 ] ]
]
},
{
"result": "tread3",
"type": "recipe",
"category": "CC_OTHER",
"subcategory": "CSC_OTHER_MATERIALS",
"skill_used": "fabrication",
"difficulty": 7,
"skills_required": [ "mechanics", 7 ],
"time": 720000,
"autolearn": true,
"using": [ [ "forging_standard", 20 ], [ "steel_standard", 20 ] ],
"qualities": [
{ "id": "HAMMER", "level": 3 },
{ "id": "CUT", "level": 1 },
{ "id": "CHISEL", "level": 3 }
],
"tools": [
[ [ "tongs", -1 ] ],
[ [ "anvil", -1 ] ],
[ [ "swage", -1 ] ]
],
"components": [
[ [ "hard_plate", 10 ] ],
[ [ "chain", 8 ] ]
]
},