Sizing a serrated edge for a snow pusher starts with the pusher’s cutting width and the base edge it replaces: match the bolt pattern and hole spacing exactly, keep the serration depth within roughly the same range as the base edge thickness, and size each segment so the assembled edge spans the full moldboard without overhang. The serrations themselves are a secondary decision — pitch and tooth depth follow from the surface you plow and the load the pusher frame can carry.
Start with the pusher, not the edge
A serrated edge is a wear part that has to fit an existing interface. Before any tooth geometry is discussed, the pusher defines the envelope: cutting width, base edge thickness, bolt diameter and spacing, and the number of segments the moldboard accepts.
Measure the following on the pusher itself rather than from a parts list, since aftermarket pushers often deviate from the original specification:
- Cutting width from end plate to end plate, in millimetres.
- Base edge thickness at the bolt line, and the thickness of the moldboard it seats against.
- Bolt hole diameter, centre-to-centre spacing, and edge distance from hole centre to the top and bottom of the base edge.
- Bolt grade and torque specification as stated by the pusher manufacturer.
- Whether the pusher uses a single full-width edge or two or three overlapping segments.
- Available vertical adjustment — how much material can be consumed before the edge no longer reaches the ground.
- End plate geometry, since serrated edges near the end plates can foul the plate weld.
If any of these are uncertain, confirm exact parameters on the product page before ordering.
Match the bolt pattern before anything else
Bolt pattern is the hard constraint. A serrated edge with the correct steel but the wrong hole spacing is scrap, and re-drilling hardened cutting edge material is not a workshop task to plan around.
Hole spacing on pusher edges commonly falls in a moderate range rather than a single value, and the tolerance on that spacing matters more than the nominal figure. Ask for the hole position tolerance alongside the drawing. Plated or coated edges can also shift effective hole diameter slightly, which matters on bolted joints that see vibration.
| Parameter | What to check | Typical range / dependency |
|---|---|---|
| Cutting width | End plate to end plate | Depends on pusher model; segments must sum to full width |
| Base edge thickness | At bolt line | Commonly in the 12–25 mm band; confirm per pusher |
| Bolt hole diameter | Matched to bolt grade supplied | Usually 14–20 mm; depends on pusher class |
| Hole spacing | Centre-to-centre, plus tolerance | Varies by manufacturer; tolerance is the critical value |
| Serration pitch | Tooth centre-to-centre | Roughly 25–75 mm; finer for hard pack, coarser for ice |
| Tooth depth | Root to tip | Depends on edge thickness; avoid exceeding base edge section |
| Segment count | Per moldboard | One to three typical; depends on width and handling limits |
Choose serration pitch and depth for the surface
Serrations exist to break the bond between packed snow and the pavement, and to keep the edge biting rather than skating. Pitch and depth should follow from the surface mix the fleet actually encounters, not from a catalogue default.
As a working rule: finer pitch with shallower teeth suits hard-packed snow and ice where continuous contact matters; coarser pitch with deeper teeth suits mixed surfaces and heavier debris loads, at some cost in smoothness of cut. Deeper teeth concentrate load on fewer points, which raises stress on the moldboard and the pusher frame. On lighter pushers, a conservative tooth depth is the safer specification. For guidance on how edge geometry interacts with wear over service life, see the technical notes on snow plow cutting edges.
Confirm material and hardness against the duty cycle
Serrated edges are usually supplied in through-hardened or boron-treated steel, with hardness selected against the abrasive mix. Higher hardness extends wear life but increases the risk of brittle failure on impact with curbs, manhole covers and frozen debris.
Wear life is a range, not a number: it depends on pavement type, down-pressure, operator technique, road salt exposure and hours per season. Buyers should expect a spread of perhaps two to one between a careful operator on smooth asphalt and an aggressive operator on grooved concrete. There is no reliable single figure without a fleet trial.
Hardness and toughness trade off. For a fleet working unknown surfaces, a mid-range hardness with good impact resistance usually produces a lower total cost than the hardest available specification, because unplanned replacement of cracked edges carries its own labour and downtime cost. Detailed hardness and dimensional options are listed on the cutting edge product range.
The commercial side: MOQ, lead time and specification risk
Serrated pusher edges are a slower-moving SKU than plain edges, so commercial terms differ. Distributors should plan around that rather than treat both as interchangeable stock.
Minimum order quantities typically depend on segment length, steel grade and whether the hole pattern is standard or custom; custom patterns generally carry a higher MOQ because the setup is not reusable. Lead time depends on whether the pattern is held on file, on mill availability for the grade, and on heat treatment batch scheduling — plan on weeks rather than days for first orders. Total cost should be assessed per plowed hour, not per kilogram: a cheaper edge that wears unevenly or fails early costs more in labour and downtime than a higher-priced edge that runs a full season. The largest specification risk is a pattern that is close but not exact; a small dimensional mismatch discovered at fitting time is a return, a re-order and a missed storm.
For public-sector tenders, edge specifications are often tabulated in bid documents, and reading those tables correctly avoids quoting the wrong pattern — see reading public bid tabulations for cutting edges.
Verify fit and adjustment before committing
Two fit checks catch most field problems: vertical adjustment range and end plate clearance. A serrated edge that cannot be adjusted down as it wears loses usable life, and one that fouls the end plate weld cannot be seated correctly.
Ask for a dimensioned drawing with hole positions, tooth profile and segment lengths, and check it against the pusher before releasing an order. Confirm exact parameters on the product page.
Quick summary
Size a serrated pusher edge from the pusher interface outward: bolt pattern and width first, then serration pitch and depth against the surface mix, then hardness against duty cycle. Treat wear life and cost as ranges that depend on operating conditions, and price the part per plowed hour rather than per unit.
Sources checked on 2026-11-12: SENTHAI Tools product and technical pages for snow plow cutting edges; general industry practice for pusher edge fitting and bolted joint specification. No independent wear study is cited.
Three more perspectives
Workshop. Fitters care about hole alignment and burr-free holes more than tooth shape. An edge that drops onto the bolts without a hammer saves real time across a fleet changeover, and consistent segment lengths make shimming predictable.
Purchasing. The cheapest per-kilogram quote often loses on total cost once fitting labour, returns and mid-season replacement are counted. Standard patterns with a documented drawing reduce both MOQ exposure and re-order risk.
Field. Operators judge an edge by whether it keeps biting as it wears and whether it survives curbs and covers. A slightly softer, tougher specification frequently outlasts a harder one in mixed municipal conditions.
Limits
This article does not provide a fitment chart for specific pusher models, does not state practical wear life, and does not cover welding-on edges or non-bolted configurations. Dimensional values given are indicative ranges only; the pusher manufacturer’s drawing and the product page govern. Nothing here replaces a physical fit check before production ordering.
