What the terms mean
The two terms describe where the grind sits, and that decides how the edge wears.
- Single bevel: a slope ground on one face, so the edge is asymmetric.
- Double bevel: slopes on both faces, so the edge is more symmetric.
- Bevel angle: how steep the slope is, set by the maker.
What each tends to do
| Point | Single bevel | Double bevel |
|---|---|---|
| Reversibility | Usually not reversible end for end in the same way; check the design | Often easier to turn if the design allows |
| Contact as it wears | Wear tends to follow the asymmetry; contact may change as the edge shortens | More even contact as it wears |
| Direction of the lead | The bevel faces a set direction relative to the pavement | Less sensitive to direction |
| Fit | Must match the moldboard’s angle | Must also match the moldboard |
| Risk of mis-ordering | Higher: wrong hand or wrong side | Lower, but profile still matters |
Questions to ask before ordering
The bevel is the part buyers most often assume rather than specify.
- Is the bevel on the leading face or the trailing face, and why? The answer changes how the edge wears.
- What is the bevel angle, and is it matched to my plow’s angle? A mismatch shows up as uneven contact.
- Can the edge be reversed, and does reversing change contact? Some designs allow it, and some do not.
- How does the drawing show the bevel? A profile at the end, not a note in the margin.
How to check an old edge
The bevel is visible if you look at the end profile rather than the face. Three checks settle what you are actually running.
- Photograph the end profile with a ruler. The angle and the bevel width are what distinguish the two designs.
- Note which side shows the bevel. A single bevel is ground on one face; a double bevel shows grinding on both.
- Check how the worn contact surface looks. A single bevel tends to polish one face; a double bevel wears more evenly.
Do not assume
Do not assume that one bevel type wears longer. Wear depends on material, surface, speed and set-up. If you are unsure, trial a pair on one truck and log the results.
A quick test on the bench
Lay the old edge on a flat surface, place a straightedge against the beveled face and photograph the gap. Do the same with the new edge from the same side. If the profile is clearly different, ask the supplier whether that is intended. Do this before fitting, because a fitted edge is harder to return and the change in contact may only show up after days of plowing.
Boundary: general explanation only; no wear or performance data. Follow the edge and plow makers’ drawings.
Further reading on this site.
Dual Sourcing vs Single Supplier for Winter Wear Parts ↗JOMA Articulating Blades and Cutting Edges: How the Mechanism Changes Wear ↗Carbide snow plow blades ↗Boss-Style Plow Edges: Poly vs Steel vs Carbide for Contractor Trucks ↗Meyer-Style Plow Edge Options: Matching Length and Profile Before You Order ↗Storing Spare Edges: Racking, Moisture and Labeling in a Small Shop ↗
