Best Combo Blades for Power Trowels for Smooth Concrete Finishes
Choosing the right combo blades can significantly impact finish quality, blade wear, and overall job speed on concrete surfaces. This guide highlights top-rated 8″ to 18″ combo blades designed for standard 34″ to 46″ power trowels. Each option balances durability, compatibility, and value to help American contractors achieve a consistent, smooth finish.
| Product | Brand | Size | Machine Fit |
|---|---|---|---|
| Stens New Trowel Blade 750-035 Combo Blade | Stens | 8″ x 14″ | Compatible with various 36″ machines (replaces multiple models) |
| Bon Tool 17-156 14×8 Combo Blade | Bon | 14″ x 8″ | Designed for 36″ power trowels |
| Virginia Abrasives 423-CB0818 Combo Blades | Virginia Abrasives | 8″ x 18″ | Fits 46″ machines |
| Virginia Abrasives 423-CB0814 Combo Blades | Virginia Abrasives | 8″ x 14″ | Fits 34–36″ machines |
| Kraft Tool SK215 ProForm Combo Blade | Kraft Tool | 8″ x 18″ | For ProForm power trowel systems |
Below are five vetted blades, each with unique strengths to accommodate different machine sizes, finish goals, and maintenance preferences. Consider blade size, blade-to-machine compatibility, and replacement availability when evaluating these options.
Stens New Trowel Blade 750-035 Combo Blade
The Stens 750-035 combo blade replaces multiple common models, offering broad compatibility for 36″ power trowels. It lists replacements for Allen, Bartell Morrison, Kraft, Marshalltown, Mbw, Multiquip, Stone, Stow, Wacker, and White Man products. Sold in packs of four, this option emphasizes versatility and ease of stocking for crews that switch between machines. Designed to deliver steady performance across frequent resurfacing tasks.
Bon Tool 17-156 14×8 Combo Blade
The Bon Tool 17-156 set is tailored for 36-inch power trowels, offering four blades per package. Bon Tool emphasizes durability and professional-grade quality, making these blades a common choice for contractors seeking reliable performance and broader tool compatibility. They are positioned as a robust option for heavy-use environments where consistent finishes are required.
Virginia Abrasives 423-CB0818 Combo Blades
These 8″ x 18″ blades are designed for 46″ power trowel machines. Virginia Abrasives highlights long-lasting manganese carbon steel construction, promoting strong rigidity and durability in demanding concrete refinishing tasks. The set of four blades supports efficient blade replacement cycles on sizable projects.
Virginia Abrasives 423-CB0814 Combo Blades
This 8″ x 14″ blade set fits 34–36″ machines and also uses manganese carbon steel for enhanced strength and durability. The four-blade package provides a ready-to-use inventory for mid-sized trowel operations, helping crews maintain consistent finishing results during repetitive passes.
Kraft Tool SK215 ProForm Power Troweler Combo Blade
The Kraft SK215 ProForm blade is sized at 8″ x 18″ and comes in a four-pack. Kraft Tool emphasizes American manufacturing and adherence to professional quality standards. This blade is positioned for power trowels that require robust performance with efficient finishing across concrete surfaces.
Kraft SK215 Combo Blade Set For Mbw, Stone & Stow
This Kraft blade set is designed for Mbw, Stone, and Stow 46″ power trowels, sold as a bolt-on four-pack. The set focuses on compatibility with specific brands while maintaining the standard four-blade package for easier maintenance and kit replenishment.
Bon Tool 17-154 Finish Blade
The Bon Tool 17-154 is a 14 by 6-inch finish blade designed for 36-inch power trowels, offered in a four-pack. This option emphasizes a finishing-focused blade geometry intended to produce smoother surfaces and reduce mar resistance during final passes.
Stens 750-047 Trowel Blade
The Stens 750-047 series blade is designed to replace multiple models and supports heavy-duty use on 46″ machines. It details replacements for Allen, Kraft, Marshalltown, Mbw, and Wacker lines, providing a versatile option for crews managing varied equipment on large-scale projects. The package is sold per pack of four.
Buying Guide: Key Purchase Considerations
- Machine compatibility: Check blade size (8″–18″) and the machine’s width (34″–46″) to ensure proper fit and finish quality.
- Material and durability: Look for manganese carbon steel or other durable alloys for long life under heavy concrete finishing tasks.
- Blade geometry and finish goals: For smoother finishes, consider blades designed for finishing passes; for aggressive cuts, select blades optimized for aggregate exposure or debonding tasks.
- Replacement availability: Choose blades sold in packs that align with your crew size and project pace to minimize downtime.
- Brand and compatibility: Some blades are marketed as universal replacements; verify exact model replacements to prevent fit issues on your trowel.
- Cost vs. lifespan: While lower-priced blades may save upfront costs, consider wear rate and the cost per finished square foot on larger jobs.
- Maintenance needs: Some blades require specific mounting hardware or bolts; confirm included hardware and installation requirements.