Size a serrated edge for a compact tractor by matching three things to your plow: the mouldboard’s bolt pattern (hole spacing and edge width), the cutting edge thickness your hardware and trip system can carry, and the tooth pitch suited to the surface you plow most. Start from the existing edge or the mouldboard’s drilled pattern, then confirm the carbide grade and tooth geometry against the product page before ordering.
Serrated edges are not a universal fit. On compact tractors the limiting factors are usually the bolt pattern, the available vertical height of the edge, and the load the trip springs and frame can absorb when a tooth catches. The sections below walk through the measurement sequence, the trade-offs between tooth pitch and surface type, and the checks that prevent a return.
Start from the mouldboard, not the blade width
The plow’s bolt pattern is fixed; the edge must conform to it. Measure the existing edge or the mouldboard itself before looking at any catalogue dimension. Width printed on a spec sheet refers to the plow, not the wear part, and the two rarely correspond directly on compact-class equipment.
- Record hole diameter, centre-to-centre spacing along the length, and the offset of any staggered rows.
- Measure the vertical height of the mounting face — the edge cannot be taller than the surface it bolts against without fouling the trip mechanism.
- Note the thickness of the current edge and the length of the plow bolts; a thicker carbide edge may need longer hardware.
- Check whether the mouldboard is straight or curved at the mounting zone; curved faces limit how stiff an edge can be before it sits proud.
- Confirm left and right ends — some compact plows use asymmetric edges, and a serrated pattern may be handed.
Tooth pitch depends on the surface you actually plow
Serration exists to bite into packed snow and ice while leaving a degree of float on loose material. The pitch — the distance between tooth tips — sets that balance. There is no single correct pitch; it depends on the mix of surfaces in your route.
| Surface mix | Pitch tendency | Trade-off |
|---|---|---|
| Mostly paved, thin packed snow | Finer pitch | Better grip on ice; more teeth to wear and more drag |
| Mixed paved and gravel | Mid pitch | Compromise between bite and gravel pickup |
| Gravel, dirt, uneven yards | Coarser pitch | Less material thrown; reduced ice grip |
On compact tractors the machine’s weight is limited, so a very fine pitch can increase drag enough to matter on loose surfaces. A coarser pitch reduces that drag but gives up ice performance. Match the pitch to the majority of your route, not the worst case.
Thickness, carbide grade, and what the frame will take
Edge thickness is bounded by the plow bolts and the trip system, not by preference. A heavier carbide edge concentrates load at the tooth tips, and on a light tractor that load transfers to the trip springs and frame. Confirm the thickness range your mouldboard and hardware accept before specifying carbide.
Carbide grade selection depends on the abrasive content of the surface. Paved routes with grit and salt call for a tougher grade; clean ice work favours wear resistance. SENTHAI’s carbide snow plow blade range lists the available thicknesses and hole patterns; the exact figures for your plow should be read from that page rather than inferred from the plow’s nominal width.
Wear life and cost are ranges, not figures
Service life for a serrated carbide edge typically falls in a broad range depending on surface abrasiveness, down-pressure, operator technique, and how much of the route is bare pavement. Quoting a single number in hours or kilometres would be misleading. The same applies to cost per season: a higher-grade edge usually costs more upfront and may last longer, but the crossover point depends on your route and how often the edge is flipped or rotated.
Two practical notes. First, serrated edges wear unevenly — tooth tips take the load first. Second, if one end of the edge is wearing faster, that is usually a mounting or alignment issue rather than a material fault; the checks in one end of the edge wearing faster apply equally to serrated profiles.
Fit checks before the first pass
Dry-fit the edge before torquing anything. A serrated edge that sits proud of the mouldboard will catch on expansion joints and pavement lips, and the resulting shock loads are what break plow bolts. If bolts are failing repeatedly, photograph the failure pattern before changing hardware — the report method in why plow bolts break is a reasonable template.
- Confirm every hole aligns without elongation; do not ream holes to fit.
- Check that the tooth tips sit flush or slightly below the mouldboard’s leading line.
- Verify bolt length gives full thread engagement without bottoming out.
- Torque to the plow manufacturer’s specification, not a generic value.
- Run one short pass on the least abrasive surface and inspect for movement.
Confirm exact parameters — hole spacing, edge height, thickness, and carbide grade — on the product page before ordering. Catalogue summaries and plow-side dimensions are not interchangeable.
What this means for distributors and OEM buyers
For distributors and OEM buyers, serrated edge sizing is primarily a specification-risk question. An edge that misses the mouldboard’s bolt pattern, vertical height or thickness window becomes a return, a credit note or a warranty conversation, and the cost lands on the channel rather than the end user. Because fit varies across compact-class plows, stocking decisions depend on how narrow the compatible range is and how many SKUs that range demands.
Supply and lead time follow the same logic. Tooth pitch, carbide grade and hole pattern often sit outside standard stock, so availability depends on the supplier’s production schedule and order quantities. MOQ and total cost of use should be assessed together: a higher-pitch edge may last longer in abrasive ground but carry a larger order commitment. Confirm dimensions and grades on the product page before committing.
Quick summary
Size a serrated edge from the mouldboard’s bolt pattern and mounting face first, then choose tooth pitch from the dominant surface on your route, and only then select thickness and carbide grade within what the frame and hardware can carry. Wear life and cost are ranges that depend on abrasiveness, down-pressure, and operator technique, so treat any single figure with caution.
Sources checked on 2026-11-08: SENTHAI Tools product page for carbide snow plow blades (/snow-plow/carbide-snow-plow-blade/); SENTHAI workshop notes on uneven edge wear and plow bolt failure patterns; general compact-tractor plow mounting practice.
Three more perspectives
Workshop. The bench check that catches most sizing errors is a dry fit on the mouldboard with the plow raised. If the edge rocks on the mounting face or any hole needs a drift to align, the pattern is wrong regardless of what the spec sheet says.
Purchasing. Order against the measured hole pattern and thickness, not the plow’s model year alone. Compact plows from the same family can carry different edge patterns, and a returned carbide edge is an expensive correction.
Field. Operators notice pitch before they notice grade. A finer pitch that grabs ice will feel productive on pavement and frustrating on gravel; record which surface dominates the route before the next order.
Limits
This page is a sizing method, not a fitment chart. It does not list specific hole spacings, edge heights, or carbide grades for any plow model, and it does not replace the plow manufacturer’s mounting instructions or the product page specifications. Wear-life and cost statements here are ranges and depend on conditions; they are not guarantees.
