Slot Liner Trim Kit

Everything you need to cut, crease, and fit slot liners from scratch. Nomex 410 aramid paper in three thicknesses, a boxwood creasing tool that won't crush the fibers, curved scissors sized for tight slot openings, and a reference chart so you're not guessing at dimensions. One kit, one order, ready to work.

What's in the kit

• 10 sheets Nomex 410 aramid paper, 0.005 in — 8.5 × 11 in
• 10 sheets Nomex 410 aramid paper, 0.007 in — 8.5 × 11 in
• 5 sheets Nomex 410 aramid paper, 0.010 in — 8.5 × 11 in
• 1 boxwood creasing tool — scores clean fold lines without tearing
• 1 pair curved trim scissors — curved blade reaches the bottom of deep slots
• Reference chart — common slot dimensions, liner thickness recommendations, and fold allowances

About Nomex 410

Nomex 410 is the industry-standard aramid paper for motor slot insulation. It holds its shape after forming, resists moisture, and won't break down under the heat cycles a rewound motor sees in service. The three thicknesses in this kit cover most fractional and small industrial motor slots — 0.005 in for tight clearances, 0.007 in for general use, 0.010 in where extra wall thickness is called for.

Who it's for

Motor rewinders, coil winders, and repair shops that cut their own liners rather than buying pre-formed. Also useful for anyone building custom transformers or inductors where slot insulation needs to be fitted by hand.