Quick Change Self Locking Drill Bits 12D

Source the Quick Change Self Locking Drill Bits 12D from RONGKE, a manufacturer in China, with order details focused on entry guidance and chip travel over the 12D working depth. The 12D self-locking drill is the long-depth option in this family. At this reach, entry alignment and continuous chip removal become central to process planning. Head compatibility remains tied to the selected body size.

Key Facts at a Glance

Component Roles

The 12D body carries the compatible TDPA cutting tip over a longer distance. Plan the entry and evacuation conditions around the entire assembled reach, including any projection beyond the holder.

Where This Configuration Fits

Choose the Quick Change Self Locking Drill Bits 12D when the job calls for entry guidance and chip travel over the 12D working depth. Select the 12D self-locking body for a deep feature requiring its documented reach. Entry support, assembled alignment and coolant access form part of the application review for that hole.

Selection guide — 12D vs 8D self-locking: for the Ø20 mm group, effective depth increases from 163 to 243.6 mm. Select 12D for the needed access and review entry guidance and chip removal for that longer hole.

Four Configuration Decisions

1. Verify the full 12D effective length

TD12-200-XP25 lists Ø20–20.90 mm, 243.6 mm effective depth and 327.6 mm overall length. The useful depth must come from the table dimension.

2. Check runout and entry guidance

Review spindle alignment, tool holding and the planned guided entry before cutting the deep feature. Establish the setup against the specific 12D tool and workpiece.

3. Review coolant delivery over the deep path

The family has internal coolant, but the catalog does not supply one pressure requirement for every 12D size. Confirm the actual machine supply and tool connection.

4. Retain access for front tip replacement

Identify the TDPA diameter group and matched front wrench. Include enough machine clearance to carry out the specified tip-change procedure at this overall length.

Order Verification

Production & inspection

Use 12D straightness and working-end runout, with the entry-support arrangement included in the application review as the inspection focus. Ask for the measurement method and acceptance limits to be stated in the quotation if a dimensional report is required.

Replacement Order Details

Confirm entry guidance and chip travel over the 12D working depth before requesting a factory price for the Quick Change Self Locking Drill Bits 12D. Give RONGKE your supplier order reference for repeat purchases.

FAQ

1. Q: Is 327.6 mm the available cutting depth?

A: No. It is the cited overall length; effective drilling depth is 243.6 mm.

2. Q: What deserves extra attention before a 12D trial?

A: Check the full working projection, entry alignment and planned guidance with the actual tool and workpiece.

3. Q: Is there a universal coolant pressure for the 12D family?

A: No universal value is stated. The requirement must be established for the selected diameter, depth and machine supply.

4. Q: Does longer reach change the self-locking replacement principle?

A: No. It retains the TDPA front-locking principle; wrench fit and physical access still need to be checked.