DEWALT DT10640: problems, parts and running costs
Checked: 2026-10-27
Summary
The DT10640 is a 165 mm, 20 mm bore, 40-tooth carbide circular saw blade sold as an Elite finishing blade for wood and MDF, with a 1.65 mm kerf and C3 carbide teeth resharpenable up to 3 times. The main issues buyers face are compatibility (the 20 mm bore is not the common US 5/8 inch arbor and no maximum RPM is published), inconsistent naming across sellers (“Elite” vs “Extreme Framing Blade”), and uncertain US availability and warranty (DEWALT UK lists “No Warranty”).
Common problems and fixes
- Arbor mismatch (20 mm bore vs US 5/8 inch) — the 20 mm bore does not match the common US 5/8 inch (15.875 mm) arbor; buyers must verify saw arbor size before use. [2][3]
- No published maximum RPM — no maximum rated blade speed was found in the sources read; verify the saw’s rated speed against the blade before use. [1][2][3]
- Inconsistent product naming — DEWALT UK calls it “Elite”, eBay calls it “Extreme Framing Blade”, and DEWALT’s overview text says “Extreme 2nd Fix”; confirm the model number DT10640/DT10640-QZ matches before buying. [1][3]
- Blade material listed as steel on eBay — eBay key features describe blade material as steel, conflicting with DEWALT and Klium’s carbide description; rely on the DEWALT/Klium carbide spec. [1][2][3]
- No US warranty or availability verified — DEWALT UK lists “No Warranty” for this product and US warranty terms were not verified; check seller terms before purchase. [1][4][5]
- Sold out on eBay at time of reading — the product showed as currently sold out on the eBay page read; check stock before ordering. [3]
Parts and consumables
- Professional resharpening — up to 3 resharpenings per DEWALT’s claim; extends service life versus a disposable blade. [1][2]
Yearly running cost
A typical owner’s cost is mainly the blade itself: EUR 22.60 at Klium (Oct 2026) per blade, with optional professional resharpening up to 3 times extending life; owners report a blade can last over a year or more if used carefully. No electricity, subscription or capsule lock-in applies. US prices were not verified. [2][3]
When it is a good buy
DEWALT’s construction-series blades are the lower-cost alternative when maximum finish is not needed (DEWALT claims up to 2x life for this Elite blade versus the construction series on double-stacked 20 mm particle board). [1][2][3]