Earthtec Mower Blades M170642 42in 2-Pack for X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R

Earthtec 42-inch Mower Blades — M170642, 2-Pack

Designed to meet the demands of home lawns and mid-size properties, Earthtec’s 42-inch mower blades deliver a balanced blend of strength and precision. The blades’ unique steel composition combines boron, carbon, manganese, and other elements to create a robust cutting edge. They are heat treated using the Marbain process, a patented method that aims to increase hardness and rigidity. This approach is intended to help the blades resist bending and wear during regular mowing sessions, especially when tackling tougher grass and uneven terrain. While real-world results depend on conditions, many users notice more consistent cutting and smoother operation with high-quality blades.

Key benefits at a glance

• Durable steel blend with boron and other elements designed for rigidity and long-lasting performance.
• Marbain heat-treatment is claimed to yield 25%–40% greater hardness than standard blades.
• Two-blade pack kept ready for quick replacement on compatible 42" decks.
• Designed to fit a broad range of 42" mowers and Z Trak models, simplifying replacement decisions.

Compatibility and fitment ensure you’re replacing the right part. The M170642 blades are suitable for 42" mowers in the X-series (X330, X350, X354, X370, X380) and Z Trak series (Z335E, Z335M, Z345M, Z345R). The consistent geometry supports straightforward mounting when you follow your mower’s standard installation steps.

Specs you can reference

• Center hole: 51/64" (0.797"); Width: 3"; Thickness: 0.156"; Length: 21.4".
• Part Number: M170642.
• Package: 2 blades per order.

Real-world use tips: For best results, ensure blades are properly aligned with the deck and mounted using correct torque. With a matched pair, you’ll have replacement coverage for routine maintenance and seasons with heavy mowing needs. The blades’ length and profile are designed to balance cutting efficiency with deck clearance, helping to minimize clogging in damp grass and debris.

Why choose Earthtec

• Brand-focused engineering aimed at dependable replacements for mid-sized lawns.
• Quality build designed to maintain cutting performance across a range of mowing tasks.
• Two blades per package for convenient, timely replacements.