A request for quotation is only as good as the specification inside it. Send “48-inch carbide blade” and two suppliers will quote two different products, because the words do not define the thickness, the hole pattern, the carbide configuration, or the steel. A vague RFQ produces random quotes, and the buyer pays for the randomness later in fit problems and change orders.
This article lists the eight specification fields every carbide blade RFQ should include, explains what happens when one is missing, and shows how to attach the drawings, samples, and part numbers that turn a request into a buildable specification.
Vague specs produce random quotes
The RFQ is the buyer’s chance to control the result. When the specification is complete, the quotes can be compared honestly, because every supplier is pricing the same product. When it is vague, each supplier fills the gaps differently, and the lowest quote is often the one that assumed the least content.
The cost of vagueness shows up after the order: a blade that does not fit, a hole pattern that needs rework, a carbide configuration that wears wrong for the route. The RFQ stage is the cheapest place to fix those problems, and the eight fields below are the checklist.
The eight spec fields that matter
1. Application and plow position. State the equipment, the position (front, underbody, or wing), and the route duty. The application drives every other choice.
2. Overall dimensions. Length, width, and thickness, in the units the manufacturer uses. “48-inch blade” is not a dimension set.
3. Edge profile and geometry. The bevel, angle, and transitions of the cutting edge. “Beveled edge” is not a specification; the angle and land width are.
4. Mounting-hole pattern. Hole size, spacing, end-hole offset, countersink, and the standard (AASHTO or DIN) where applicable. The pattern is the interface with the plow.
5. Carbide configuration. Brazed inserts, overlay, or another construction, with the insert shape and layout where relevant.
6. Material specification. The carbide grade and the steel carrier (SENTHAI describes premium C45 steel for its blade line), confirmed on the material certificate.
7. Quantity and packaging. The order volume, packaging requirements, and any marking or labeling.
8. Documentation and acceptance. The inspection plan, batch records, and acceptance criteria the buyer will apply at receiving.
| Spec field | What to state |
|---|---|
| Application and plow position | Equipment, position (front, underbody, or wing), and route duty |
| Overall dimensions | Length, width, and thickness, in the units the manufacturer uses |
| Edge profile and geometry | Bevel, angle, and transitions of the cutting edge |
| Mounting-hole pattern | Hole size, spacing, end-hole offset, countersink, and the standard (AASHTO or DIN) |
| Carbide configuration | Brazed inserts, overlay, or another construction, with the insert shape and layout |
| Material specification | Carbide grade and the steel carrier |
| Quantity and packaging | Order volume, packaging requirements, and any marking or labeling |
| Documentation and acceptance | Inspection plan, batch records, and acceptance criteria applied at receiving |
Every field on this list is a manufacturing input. Missing one means the factory chooses, and the choice is made without the buyer’s intent.
What happens when a spec is missing?
Each missing field produces a predictable problem:
- Missing dimensions: the blade arrives the wrong length or thickness;
- Missing hole pattern: the bolts do not line up, and the field fix is a drill, which voids the product’s integrity;
- Missing carbide configuration: the blade wears wrong for the route, and the warranty conversation starts with a dispute about what was ordered;
- Missing material: the buyer cannot verify the grade, and the receiving check has nothing to compare;
- Missing documentation: the order ships without the records the buyer’s system requires.
The pattern is consistent: the missing field is discovered at the wrong end of the process, either at receiving or on the truck. The RFQ is where each field costs nothing to add.
The missing-field problem also damages the comparison between suppliers. Two quotes for the same vague RFQ cannot be compared fairly, because each supplier priced a different product. The buyer who fills the eight fields converts the RFQ from a price request into a specification, and the comparison becomes a check against one defined product instead of a guess across several.
How do you attach drawings, samples, and part numbers to an RFQ?
The attachments are what make the eight fields concrete:
- A drawing defines the dimensions, profile, and hole pattern precisely;
- A sample shows the manufacturer the physical reference, including wear patterns and mounting condition;
- A part number ties the RFQ to the fleet’s existing records and the supplier’s history, if any;
- Photos of the plow mounting area help confirm the hardware context.
SENTHAI’s ordering page lists exactly these items as the information needed for an accurate quotation: product type, dimensions, thickness, profile, hole pattern, part number, drawing, photos, or sample information. Send the attachments with the RFQ, and the quote comes back against the real product.
The ordering page is worth reading as the counterpart to this article: it explains how quotations are prepared, how samples are confirmed, and how order documents control the terms. The buyer who knows the supplier’s ordering process can structure the RFQ to match it, which shortens the cycle and reduces the back-and-forth. The warranty, shipping and ordering page is that reference.
Reviewing quotes against your specs
The review is a comparison, not an impression. Build a one-line checklist from the eight fields and score each quote against it:
- Does the quote confirm the dimensions and profile?
- Does it state the hole pattern and standard?
- Does it name the carbide configuration and materials?
- Does it include the inspection plan and documentation?
- Does it state the quantity, packaging, and delivery terms in writing?
A quote that confirms the fields is a price for the product; a quote that stays vague is a price for a guess. The review also catches the supplier’s questions: a good factory asks for the missing information, and the questions are a sign of engineering involvement, not a delay.
The review should end with a written comparison, even if it is a simple table with the eight fields as rows and the quotes as columns. The written form makes the gaps visible and keeps the decision from drifting to price alone. A quote that costs less but leaves the carbide configuration open is not cheaper; it is unfinished.
The comparison should also note the supplier’s response time and questions. A factory that asks for the missing dimensions within a day is engaged in the specification; one that quotes immediately on a vague request may be quoting from a default. The response pattern is part of the evaluation, because the RFQ is the first test of how the supplier will handle the real order.
Once the quotes are compared, the chosen supplier should confirm the specification in writing before production. The RFQ, the drawing, and the confirmation together form the reference that the receiving check and the warranty terms will both look back to, so the written confirmation is not a formality; it is the contract.
The buyer should also keep the RFQ file for the season. When the blades arrive, the receiving team checks them against the confirmed specification; when a blade fails in the field, the file shows what was ordered and confirmed. The RFQ that started as a request ends as the reference document for the whole order, which is another reason the eight fields are worth filling completely.
The file is the fleet’s memory of what was bought and why.
Send a complete RFQ today
The complete RFQ is the buyer’s most powerful tool, and building it takes minutes once the fields are known. Fill the eight fields, attach the drawing or sample, and send the package through the contact page. SENTHAI’s carbide snow plow blade page describes the standard construction the RFQ will build on, and its engineering team confirms the specification before production.
The next quote you receive will be as good as the next RFQ you send. Fill the eight fields, and the randomness disappears from the pricing and the product.
Expert view — SENTHAI engineering team: “The RFQ is the specification’s first draft. The eight fields are what make the quote a price for the product.”
Frequently Asked Questions
Why do RFQs with the same words get different quotes? Because vague specifications let each supplier fill the gaps differently. The eight fields define the product so the quotes can be compared honestly.
Which spec field causes the most problems when missing? The mounting-hole pattern. A wrong pattern fails at installation and cannot be fixed without modifying the blade.
What does “beveled edge” fail to specify? The angle, the land width, the transition, and the tolerance. Without those, two suppliers will produce two different edges from the same two words.
Should I send a drawing with the RFQ? Yes, when one exists. A drawing defines the dimensions, profile, and hole pattern more precisely than words, and it is listed by SENTHAI as key RFQ information.
How do I compare quotes? Score each quote against the eight fields. A quote that confirms the fields is a price for the product; one that stays vague is a price for a guess.
What should the quote confirm in writing? Dimensions, profile, hole pattern, materials, inspection plan, documentation, quantity, packaging, and delivery terms.
Does SENTHAI ask clarifying questions on RFQs? SENTHAI’s ordering guidance says it reviews requirements and may request clarification before quoting, which is the behavior of a factory that treats the specification seriously.
What is the fastest way to improve the quotes I receive? Fill the eight fields and attach a drawing or sample. The completeness of the RFQ is the single largest factor in the accuracy of the quotes it produces.
Sources
- SENTHAI – Carbide Snow Plow Blade product page
- SENTHAI – Warranty, shipping and ordering
- SENTHAI – Official website
- SENTHAI – Contact and quotation
- AASHTO – American Association of State Highway and Transportation Officials
- FHWA – Road Weather Management