To make custom carbide inserts to drawing, the factory needs your dimensioned drawing with tolerances, material grade and hardness, quantity per size, edge preparation and coating, the wear pattern or failure mode you are correcting, and the interface dimensions of the cutting edge you are replacing. Without those, a supplier can only quote a generic insert. With them, the factory can confirm tooling, price the run and hold the geometry that matters on your plow.
Start with the drawing, not the description
A sketch on a purchase order is not a drawing. The factory can work from a PDF or DXF, but it must be dimensioned, dated and revision-controlled, because the insert geometry is what gets machined and inspected. Verbal descriptions of “the same as our current one” leave too much to interpretation.
- Fully dimensioned views, including thickness, hole position and any relief angle
- Tolerances on every functional dimension — not just a general note
- Datum callouts, so inspection matches design intent
- Revision number and a named contact for engineering questions
Material grade and hardness
Carbide inserts are not one material. The grade, binder content and hardness determine wear life and toughness, and the factory needs your target, not a guess. If you are replacing an existing insert, send the original grade data or a sample for comparison.
Be explicit about whether hardness, transverse rupture strength or corrosion resistance is the priority. These trade off against each other, and a factory that knows the priority can propose a grade rather than pick one at random. For reference geometry and grade options, see the carbide inserts product page.
Edge preparation, coating and fit
The cutting edge is where the insert meets the road, and small differences in edge prep change how it wears. The factory needs to know the edge treatment, coating (if any) and how the insert seats against the plow blade or base edge.
- Edge prep: sharp, honed, or chamfered — with the radius or chamfer size
- Coating type and thickness, if specified
- Mounting: hole size, countersink, bolt class and torque
- Mating surface dimensions and flatness of the base edge
Quantity, tooling and what drives cost
Custom inserts need tooling, and tooling is amortized over the run. The factory needs your annual volume and your order pattern, because a single large order and twelve small ones carry different setup costs. This is where the commercial conversation starts.
| Input | What it affects | What to send |
|---|---|---|
| Annual and per-order quantity | Tooling amortization, unit price | Forecast by size and month |
| Number of distinct sizes | Setup time, MOQ per size | Full size list with quantities |
| Drawing complexity | Machining time, inspection cost | Dimensioned drawing, tolerances |
| Grade and coating | Material cost, lead time | Target grade or sample |
| Packaging and labeling | Handling, freight | Carton spec, label format |
Treat MOQ, tooling cost and lead time as quote-dependent. They move with quantity, grade and drawing complexity, and a factory that quotes without your drawing is guessing. Price and lead time come from a written quote; specifications come from the product page.
What the factory will ask you back
Expect a technical query list before any quote is firm. A factory that asks nothing is not engineering the part. Typical return questions cover tolerances that are tighter than the process can hold, grades that are unavailable in your quantity, and features that cannot be inspected economically.
- Which dimensions are functional and which are reference?
- What is the acceptable wear limit before replacement?
- Is the insert reversible, and does the mounting allow it?
- What failure mode are you trying to eliminate?
- What is the inspection method and acceptance criteria?
On reversibility, the rules for flipping an edge are worth reading before you specify a symmetrical insert: can you flip a cutting edge — reversible rules.
Commercial reality: supply, MOQ and specification risk
Custom carbide is a tooling-led purchase, so the commercial terms follow the tooling. MOQ is usually set per size, not per order, and lead time includes tooling fabrication plus a production run. Plan for a first-article approval step before volume shipment.
Specification risk is the larger cost. An insert that is dimensionally correct but wears faster than expected costs more in downtime and replacement than the unit price difference. Lock the grade, edge prep and inspection criteria in writing before tooling is cut, and keep a first-article sample on file. A clear drawing and a stated wear target reduce the chance of a second tooling cycle. For the full range and interface details, refer to the snow plow carbide inserts page.
Quick summary
Custom carbide inserts to drawing require a dimensioned, revision-controlled drawing, a defined grade and edge prep, quantity by size, and a stated wear or failure target. MOQ, tooling cost and lead time depend on quantity, grade and drawing complexity, so confirm them in a written quote. Price and lead time come from a written quote; specifications come from the product page.
Sources checked on 2026-11-13: SENTHAI Tools internal product and process documentation; customer drawing and first-article workflows; standard carbide grade and edge preparation references.
Three more perspectives
Limits
This page is not a quotation, a grade recommendation or a warranty of wear life. It does not replace a dimensioned drawing, a first-article inspection or a written supply agreement. Actual life and cost depend on plow setup, surface, speed and operating hours.
