MAC Professional Series 8 Inch Chef's Knife (MTH-80): problems, parts and running costs

Checked: 2026-10-18

Summary

A Japanese-made 8-inch chef’s knife with a thin, very sharp blade, made for cooks who want precision and low weight; the usual complaints are a short handle that forces a pinch grip, staining on the high-carbon blade, and a thin edge that chips if abused. There are no consumables — the only running cost is occasional sharpening — and it is a bargain around $145, good value at $159-175, and a harder case above $190.

Common problems and fixes

Short handle forces a pinch grip — the handle is much shorter than most 8-inch chef knives; TechGearLab says it is not for inexperienced hands, and Wirecutter’s 6-foot-6 tester found the handle and knuckle clearance too small and preferred the Wusthof handle. Handle one before you buy if you have large hands. [2][3]
Staining and rust on the high-carbon blade — Wirecutter reports owner complaints about blade staining, and a MAC representative explained rust spots appear when the knife is not rinsed and dried after acidic foods. Rinse and dry by hand after each use; the 25-year warranty explicitly excludes staining and corrosion. [2][6]
Thin blade chips if abused — no bones, frozen food, shellfish shells, hard squash, or cutting on glass or stone. The warranty excludes accidental damage. [5][6]
Counterfeits are widespread — MAC’s counterfeit page says any new MTH-80 below about $144.95 is counterfeit, usually listed at $50-60, and Wirecutter staff actually received a fake. Buy from an authorized dealer or the warranty is void. [7][2]

Parts and consumables

No replaceable parts or consumables reported. The only maintenance costs are sharpening-related: MAC sells its own sharpening and repair service and Chef Knives to Go advertises a sharpening add-on, but neither publishes a price in the sources; a ceramic honing rod is the recommended companion for regular honing, also without a published price. [8][5][6]

Yearly running cost

No consumables and no scheduled costs. The only recurring expense is occasional sharpening — MAC’s own sharpening and repair service or the Chef Knives to Go add-on — and neither publishes a price in the sources, so a yearly figure cannot be computed. Expect the cost to be limited to sharpening at whatever interval the edge needs it.

When it is a good buy

Around $145 — Wirecutter calls “$145 or so a bargain” for the MTH-80. [2]
$159-175 — widely considered good value against German peers; Cutlery and More lists it at $159.95, Chef Knives to Go at $159.00 and Mountain Life at $159.95 (October 2026), and TechGearLab lists it at $175. [4][5][3][9]
Above $190 — the case rests on how much you want this specific blade and handle; MAC’s own page lists it at $190, marked down from a $195 compare-at, and MyKnifePro lists it at $209. [1][10]
Below about $144.95 — do not buy: MAC says any new MTH-80 sold below about $144.95 is counterfeit, usually listed at $50-60, and the warranty is void from unauthorized sellers. [7]
Alternatives: a Victorinox chef’s knife is the better choice when budget matters most — an r/AskCulinary thread argues the MTH-80 is not worth the extra money over a Victorinox and that MACs are harder to care for. [11] A Wusthof is the better choice for large hands or a full-hand grip — Wirecutter’s 6-foot-6 tester preferred the Wusthof handle. [2] The Global G-2 is the comparison owners reach for when debating Japanese knives. [12]