Crain 821 Carbide-Tipped Undercut Saw Blade
The Crain No. 821 Carbide-Tipped Undercut Saw Blade is a 6-1/2" replacement blade designed for the Crain No. 812 Super Saw and No. 820 and No. 825 Heavy-Duty Undercut Saws. Its 40 carbide-tipped teeth and precision-formed steel blade body provide smooth, accurate cutting when undercutting wood doors, wood jambs, wood base, and drywall.
The large 6-1/2" diameter also helps compatible Crain saws reach fully into inside-corner areas where clearance can be limited.
Features & Benefits
- 6-1/2" blade diameter: Large diameter helps compatible Crain undercut saws reach into inside-corner areas.
- 40 carbide-tipped teeth: Designed for smooth, accurate cutting in approved wood and drywall applications.
- Precision-formed steel body: Provides a stable cutting platform for undercutting work.
- Direct Crain compatibility: Fits Crain No. 812, No. 820, and No. 825 undercut saws.
- Made for flooring prep: Ideal for undercutting jambs, doors, and base so flooring can extend underneath.
- Replacement blade: A direct replacement option for compatible Crain undercut saws when the existing carbide blade is worn or damaged.
Compatible Crain Undercut Saws
- Crain No. 812 Super Saw
- Crain No. 820 Heavy-Duty Undercut Saw
- Crain No. 825 Heavy-Duty Undercut Saw
Approved Cutting Materials
The Crain 821 is designed specifically for undercutting:
- Wood doors
- Wood door jambs
- Wood baseboards / wood base
- Drywall
Important Material Restrictions
Do not use the Crain 821 on metal, masonry, stone, or ceramic tile. This carbide-tipped blade is intended for wood and drywall applications only.
For masonry, ceramic tile, or stone applications, use the appropriate Crain masonry or diamond undercut blade specified for those materials.
Designed for Undercutting Around Flooring
When installing flooring, door jambs and trim often need to be undercut so the new flooring can slide underneath for a cleaner finished appearance. The Crain 821 is built specifically for this type of cutting with compatible Crain undercut saws.
Its 6-1/2" diameter provides the reach needed to work into inside corners, while the 40 carbide-tipped teeth provide a controlled cut through approved wood and drywall materials.
Specifications
| Brand | Crain |
|---|---|
| Model / Part Number | 821 |
| Product Type | Carbide-Tipped Undercut Saw Blade |
| Blade Diameter | 6-1/2" |
| Tooth Count | 40 |
| Tooth Type | Carbide-Tipped |
| Blade Body | Precision-Formed Steel |
| Compatible Saws | Crain 812, 820 & 825 |
| Approved Materials | Wood Doors, Wood Jambs, Wood Base & Drywall |
| Net Weight | 6 oz. |
What's Included
- 1 × Crain No. 821 Carbide-Tipped Undercut Saw Blade
Frequently Asked Questions
Which saws fit the Crain 821 blade?
The Crain 821 fits the Crain No. 812 Super Saw, No. 820 Heavy-Duty Undercut Saw, and No. 825 Heavy-Duty Undercut Saw.
What size is the Crain 821 blade?
The Crain 821 has a 6-1/2" diameter and features 40 carbide-tipped teeth.
What materials can the Crain 821 cut?
It is designed for undercutting wood doors, wood jambs, wood base, and drywall.
Can the Crain 821 cut ceramic tile or stone?
No. The Crain 821 should not be used on ceramic tile, stone, masonry, or metal. Use the appropriate Crain masonry or diamond blade for those materials.
Why does the blade have a 6-1/2" diameter?
The larger blade diameter allows compatible Crain undercut saws to reach farther into inside-corner areas during undercutting work.
How many teeth does the Crain 821 have?
The blade has 40 carbide-tipped teeth for smooth, accurate cutting in approved materials.
