Drill bits, HSS-G, 7,5

• Drill holes for assembly and machining tasks, including preparation for subsequent threading when required.
• Process: manual driving or assisted driving depending on your holder and machine setup
• Use: thread cutting, re tapping, and thread cleaning depending on condition
• Use stable workholding, because movement during the start often causes oversize threads.

Note Use a stable setup and correct lubrication for the alloy to avoid heat driven wear.

• General purpose hole making for workshop tasks
• Stable cutting edges when your setup is consistent
• Suitable for preparation steps before threading and assembly
• Simple tool selection when diameter is defined in the product name
• Helps keep thread quality stable when you use appropriate lubrication

• Sensitive to misalignment, especially during the first turns
• Not intended for high performance production cycles without validated process parameters

1. Mark the drilling point and secure the workpiece with stable clamping.
2. Center the tool and start with straight alignment to the surface.
3. Apply suitable lubrication for the work material if your process requires it.
4. Drill with consistent feed while allowing chips to evacuate freely.
5. Retract to clear chips when needed and avoid rubbing at low feed.
6. Deburr the hole edge and clean the bore before the next process step.

• 1 piece Drill bits, HSS-G, 7,5

• Product type: Drill Bit
• Tool material: HSS-G

How do you select the correct thread designation for this product

Match the thread designation in the product name to the mating fastener or component standard, then confirm that your workpiece material and process setup suit the tool type. If you work with mixed standards, separate your tooling by thread family to avoid mix ups.

How do you select drilling parameters

Set speed and feed based on the work material and your machine capability, then adjust to maintain stable chip evacuation. Use lubrication where needed and avoid rubbing. If the bore will be threaded, keep the hole round and the entry edge clean.

Which hole preparation checks matter most

Prepare the entry edge, remove burrs, and keep the hole clean so the tool starts straight. In blind holes, confirm that there is enough depth for the tool lead and chip space. In through holes, support chip evacuation out of the exit side.

How do you reduce the risk of misalignment

Start the tool with the axis visually aligned, then guide it through the first turns with low torque. Use stable workholding and avoid side load. If a thread feels tight early, remove the tool, clean chips, and inspect the entry.

Can this be used for thread preparation

If the product name indicates a thread preparation context, use it as the drilling step before tapping or forming. Follow your tapping chart or process sheet for the correct drill assignment. Keep the hole clean before the threading step.

Where can you find the full VÖLKEL catalog section for this product family

VD 23 catalog as PDF