DEWALT DT10640 Circular Saw: Review, Pros & Cons

Summary

A 165 mm, 20 mm bore, 40-tooth carbide circular saw blade for wood and MDF, sold by DEWALT as an Elite finishing blade. Check your saw’s arbor first: the 20 mm bore is not the common US 5/8 inch (15.875 mm), and no maximum RPM was published, so confirm compatibility before buying.

Strengths

40 carbide teeth and a 1.65 mm kerf favor smooth finish cuts and cordless runtime.
C3 carbide teeth can be resharpened up to 3 times, extending service life.
Anti-vibration and resin-filled expansion slots damp noise and vibration.
Nail-tough, impact-resistant carbide stands up to incidental nail contact.
Owner feedback on eBay is strongly positive, with recurring praise for clean cuts and easy pushing through wood.

Weaknesses

The 20 mm bore differs from the common US 5/8 inch (15.875 mm) arbor, so compatibility must be verified.
No maximum RPM was published in the sources read, so rated blade speed is unknown.
The product is named inconsistently across sources (“Elite” on DEWALT UK, “Extreme Framing Blade” on eBay).
eBay’s key features list blade material as steel, conflicting with DEWALT and Klium’s carbide description.
No independent instrumented test of exact DT10640 was found.
US availability, US price and US warranty terms were not verified; DEWALT UK lists “No Warranty” for this product.

Verified specifications

Model	DT10640 (UK/EU sale number DT10640-QZ).
Type	circular saw blade; individual; piece count 1.
Diameter	165 mm.
Bore	20 mm.
Tooth count
Kerf	1.65 mm.
Plate thickness	1.0 mm (Klium).
Blade material	carbide teeth (DEWALT describes premium-grade / C3 carbide; Klium describes C3 next-generation carbide) on a steel plate.
Application	hard wood, soft wood, cross cutting, sheet goods; wood and MDF (Klium).
Features	anti-vibration slots; resin-filled expansion slots; anti-kickback design; nail-tough impact-resistant carbide; optimized face shear and face grind; exclusive plate technology.
Life claim	up to 2x life versus construction series when cutting double-stacked 20 mm particle board.
Resharpening	C3 carbide teeth can be professionally resharpened up to 3 times.
Included	(1) ELITE CSB 165 x 20 mm 40T blade.
EAN/GTIN	5035048085837.
Supplier number
Weight	0.181 kg (Klium) / 222 g (eBay).
Maximum RPM	not stated in any source read.

Full research notes and sources

Compatibility and arbor

The 20 mm bore is the first thing to check. It does not match the common US 5/8 inch (15.875 mm) arbor, and no maximum RPM or guard-clearance data was found in the sources read. Buyers must verify saw arbor size and rated blade speed before use. The product is also named inconsistently: “Elite” on the DEWALT UK page, “Extreme Framing Blade” on eBay, with DEWALT’s own overview text using “Extreme 2nd Fix” wording. Klium’s “All Features” table contains mislabeled fields (rake angle in mm, kerf thickness shown as a grind type, tooth count shown as a direction), so only its key-features block should be trusted, and eBay’s dimension fields (width 1940, length 21.6) should not be treated as reliable.

Owner reports

Quoted owner comments include “Good all round cutter” as a general-purpose blade for DIY use; “leaves a good clean cut”; “narrow kerf so longer battery life” when fitted to a cordless saw; cuts oak sleepers with ease; “effortless to push the saw through wood” after fitting the blade; “from new, if used carefully can last over a year or more”; and “fitted my battery saw perfectly”. Owners also report the blade fits cordless circular saws and is useful for worktops. No detailed failure-mode text was found: two one-star entries appear among 133, but the reasons are not shown on the page read, and no leak, breakage, tooth-loss or warping complaints were documented in the read material. The product showed as currently sold out on the eBay page read.

No US price was verified. Ownership cost is mainly the blade itself plus optional professional resharpening (up to 3 times per DEWALT’s claim); no consumable lock-in applies.

Which model this is

This page covers DEWALT model DT10640, sold in the UK/EU as DT10640-QZ. The research record identifies it as a circular saw product with 165 mm diameter, 20 mm bore, 40 teeth, 1 piece and carbide blade; the sources identify it as a circular saw blade, not a saw. Retailers use different names (“Elite” versus “Extreme Framing Blade”) for the same model. ASIN B00DI8RF0Y identifies the original listing. Do not confuse it with other DEWALT blades or saws unless a source explicitly identifies them as DT10640.