DIN 1412 concerns point forms for twist drills made from high-speed steel. It is not a general drill-diameter and overall-length series. A request for “DIN 1412 size” therefore needs a separate dimensional specification. This guide explains the size fields to confirm, common ordering mistakes and how to approach a supplier with a complete requirement.
What does DIN 1412 cover?
Use the point-form designation to describe the required grind, and use the applicable dimensional series or an approved drawing to describe the tool envelope. Do not assume that a familiar split-point appearance establishes the standard, a particular form or identical performance on a different tool material.
The reference used here is DIN 1412:2001-03. Read the primary standard or manufacturer reference for the exact scope. For a purchase requiring formal conformance, identify the agreed edition and obtain the applicable standard and item drawing; the checklist below does not reproduce its complete dimensional tables.
Which sizes belong on the RFQ?
There is no single universal “DIN 1412 drill size.” A standard identifies a defined family or feature, while the order still needs a selected diameter and the relevant geometry. Record each size using the symbols on the supplier’s drawing, because symbol conventions can differ between catalogs. Use millimetres for dimensional fields and state any angular requirement separately.
| Size or specification field | What to confirm |
|---|---|
| Point form | Required DIN 1412 form or explicitly approved grind |
| Diameter | Independent nominal cutting diameter |
| Length series | Separate standard or item drawing for flute and total length |
| Tool material | HSS construction or a separately reviewed alternative |
| Application | Entry, material and sharpening/regrinding requirements |
If a catalog provides several rows for one diameter, preserve the full item code and any form or length suffix. Do not select a nearby row solely because the diameter matches. A tool’s nominal size, manufacturing tolerance and the component’s finished-hole tolerance are different pieces of information.
A practical selection mistake to avoid
An RFQ may state “DIN 1412 C drill” but omit the length series. The supplier can understand the requested point style while still lacking enough information to select a tool. Add the diameter, flute length, overall length and shank interface. When a reground tool is being copied, distinguish the desired original grind from wear or previous sharpening changes.
Who can supply DIN 1412 tooling?
Gühring publishes a technical sheet explaining DIN 1412 point forms. Use that as a point-geometry reference, then select the complete drill separately from the manufacturer catalog.
Use the linked catalog as a starting point, then request the exact item drawing, construction, size row and standard edition from the seller. A manufacturer’s broad tool portfolio is not evidence that every diameter or form is stocked, or that a custom proposal automatically conforms to DIN 1412.
Discuss a carbide alternative with KYTOOLS
KYTOOLS (Changzhou Kong Yun Precision Tools Co., Ltd.) publishes solid-carbide drill families and drawing-based tooling. If you are considering a carbide alternative or a special geometry, send the original standard requirement together with the part drawing and existing tool dimensions. Ask KYTOOLS to review the proposed construction and dimensional match before approval.
The published KYTOOLS catalog is the source for its listed models; this article does not declare those models compliant with every DIN number discussed. Keep any requirement for DIN 1412 conformance, including form, edition and inspection documentation, explicit in the inquiry.
A useful quotation and approval checklist
- Attach the component drawing and, if available, the existing tool drawing or printed catalog code.
- State the workpiece material, hole condition and required dimensions with units and tolerances.
- Identify the machine, holder or taper connection and the coolant arrangement.
- Name the required standard edition and any permitted deviations; request written confirmation on the proposed drawing.
- Agree quantity, measurement method, marking, quotation validity and delivery destination.
When comparing a conventional standard tool and a drawing-based carbide alternative, qualify the proposed process as well as the purchase description. Keep the approved drawing and inspection record with the item code so a later reorder refers to the same configuration.
Send your drill specification to KYTOOLS, or download the drill catalog and inquiry template.