This is a quick review of the Ray Iles mortise chisels sold at TFWW. I have a set of Narex mortise chisels, but decided to upgrade to a "real" pigsticker in my most commonly used size (5/16" - don't ask). As background, I cut mortises using the following technique:
- Mark out using a 2-wheel (actually dual-arm) cutting gauge
- Chop out the entire mortise to a depth of ~1/16". I do this to establish "guide walls" on both sides so that I don't have to worry about positioning once the serious cutting starts.
- Work from the center out with the bevel facing outwards, alternating orientations. This technique makes a "V" profile cut that grows from the center out.
- Upon reaching the end, chop the bottom out vertically to true up the ends of the "V".
It's basically a combination of the "layered" technique advocated by Kirby and others (step 2) and the traditional "center-out one-pass" technique (steps 3-4). I don't pre-drill on a press. I always configure mortising chisels with 20 deg primary bevels and fairly sizeable 35 deg secondaries. That's the as-shipped configuration for the Ray Iles pigstickers but requires some work on the Narex chisels.
The short summary is: The Ray Iles chisel works extremely well. Other than the obvious differences in configuration and bulk, I notice 3 main differences between it and the Narex ones:
- For whatever reason I'm about 50% faster with the pigsticker even when all else (wood, mallet, starting sharpness) is held constant. I think that some of this comes down to the fact that I rapidly figured out that I could take more aggressive cuts without rolling the edge over (see 3 below), and part comes down to stiffness and impact transmission.
- They're more accurate, at least for me. The Narex chisels are tapered both in profile (~1 deg/side or so) and along their length (~0.25 deg/side), while the Ray Iles is only tapered in profile. This means that the sides of the Narex ones aren't a reliable reference for vertical, and will allow the cut to change direction a bit if you're not careful. It also presents some issues when levering material out. Admittedly we're not talking about a whole lot of taper here, but even so I can see it reflected in my results when I check accuracy with a square (I use the Vesper double square with a thin blade to check mortise sides). It took a little bit of practice to *not* correct for the tapered side edge though.
- The edge lasts longer in the Ray Iles chisel, and when it fails it doesn't require as much material to be removed as the Narex chisels do to get back to a clean edge.
Some random notes about the construction and materials in the Ray Iles chisel:
- The D2 steel works surprisingly well in this application. Because it contains a lot of chromium carbides I sharpened it using diamond media (plates/pastes for back, lapping film for bevel) in the hopes that I could sharpen the carbides in situ instead of just knocking them out. It seemed to work - I wouldn't describe the edge as terrific, but it was better than I've seen from D2 in the past (admittedly honed with waterstones in previous instances) and more than good enough for chopping. The edge life was extremely good given the pounding it took, and noticeably better than the "Cr-Mn" steel in the Narex chisels
- The pigsticker is TALL in cross-section, at just under 1/2" at the top of the primary bevel, and just over 3/4" at the bolster. The only honing guide I have that works with it is the old Veritas Mk I top-clamp guide. The slightly tapered sides foil side-clamp guides, and the chisel is so tall that it contacts the roller in the Veritas Mk II guide.
- The blade geometry is accurate as-shipped, with very slight lengthwise concavity and crosswise convexity in the face, and moderate crosswise convexity in the bevel. None of those matters much for a mortise chisel, but my OCD compelled me to flatten the first couple inches of the face and the entire primary bevel. Doing so took ~10 min.
The bottom line is that while the Narex chisels are unbeatable for the price, you do get what you pay for in this instance. Don't be surprised if a full set of Narex mortise chisels appear in the classified before long.