DIN 1869 covers the extra-long series of parallel-shank twist drills. It helps identify the tool’s dimensional family, while the application still needs an entry plan, adequate support and a chip-evacuation review. This guide explains the size fields to confirm, common ordering mistakes and how to approach a supplier with a complete requirement.
What does DIN 1869 cover?
Do not confuse an extra-long conventional twist drill with any solid-carbide drill carrying an L/D label. Those descriptions refer to different ways of specifying tools. A 20D product name does not establish conformance to DIN 1869, and the standard name does not establish a coolant-through configuration.
The reference used here is DIN 1869:2006-11. 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 1869 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 |
|---|---|
| Diameter | Nominal cutting diameter and tolerance |
| Length selection | Required dimensional series and actual item lengths |
| Entry condition | Flat, inclined or intersecting entry surfaces |
| Hole depth | Full-diameter depth and blind/through condition |
| Process arrangement | Guidance, coolant supply and proposed cycle |
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
For a long oil passage, the buyer should mark cross-holes and the distance to each intersection. A drill may have enough total length but encounter an interruption that requires application review. Obtain a tool-specific process proposal rather than copying a cycle from an unrelated shorter tool.
Who can supply DIN 1869 tooling?
Use Gühring’s deep-hole and conventional drill catalogs to identify possible tools, then request the exact standard reference. A supplier’s custom deep-hole solution can be appropriate without being a DIN 1869 item.
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 1869.
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 1869 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.