CNC grinding: end mills, drills & special cutters
See how we use a CNC grinder to make carbide end mills, drills and special cutters.
Watch on YouTubeDIN 6537 Standard Sizes · Coolant-Thru Drill Depth Ratio
8D DIN 6537 Carbide Coolant-Thru Drills
These are German DIN 6537 standard-size coolant-through carbide drills. The 8D ratio tackles deep-hole applications where chip evacuation and heat build-up are the primary failure modes. Internal coolant channels maintain cutting temperature and flush chips continuously, enabling consistent hole quality in steel, stainless, and ductile iron at depths where standard drills fail.
For buyers checking Gühring 8D drill price, this page gives a factory-direct DIN 6537 size table, visible reference prices, pilot-hole guidance, coolant requirements, and RFQ data for evaluating a cost-effective alternative.
8xD deep hole drilldeep hole carbide drillcoolant through deep drillingstainless steel deep hole
Applications
Deep holes in steel · Ductile iron components · Stainless manifolds · Oil and coolant galleries
Feed-In Method
Use a pilot hole, enter at low RPM/feed, then switch to full speed after the drill is supported. Avoid dwell in the hole.
Pilot Hole
Recommended. Pilot diameter should match the drill tolerance closely and guide at least 1.5-2D.
Coolant Requirement
Internal coolant at 30-50 bar with clean filtration is strongly recommended for chip evacuation.
8D DIN 6537 SKU Range
Complete 8D DIN 6537 Coolant-Thru Drill Sizes
Deep hole — steel, stainless, ductile iron, oil galleries
| CUTTER DIA (D1) h7 | FLUTE LENGTH (L2) | SHANK DIA (D2) h6 | OVERALL LENGTH (L1) | Price | SKU PAGE | |
|---|---|---|---|---|---|---|
| 3.00 | 0.1181 | 30.00 | 4.00 | 70.00 | $12.06 | Details |
| 4.00 | 0.1575 | 42.00 | 4.00 | 83.00 | $15.09 | Details |
| 5.00 | 0.1969 | 50.00 | 6.00 | 90.00 | $24.60 | Details |
| 6.00 | 0.2362 | 57.00 | 6.00 | 97.00 | $27.11 | Details |
| 7.00 | 0.2756 | 76.00 | 8.00 | 116.00 | $46.55 | Details |
| 8.00 | 0.3150 | 76.00 | 8.00 | 116.00 | $46.55 | Details |
| 9.00 | 0.3543 | 87.00 | 10.00 | 131.00 | $70.56 | Details |
| 10.00 | 0.3937 | 95.00 | 10.00 | 139.00 | $75.39 | Details |
| 11.00 | 0.4331 | 106.00 | 12.00 | 163.00 | $117.83 | Details |
| 12.00 | 0.4724 | 114.00 | 12.00 | 163.00 | $117.83 | Details |
| 13.00 | 0.5118 | 133.00 | 14.00 | 182.00 | $177.43 | Details |
| 14.00 | 0.5512 | 133.00 | 14.00 | 182.00 | $177.43 | Details |
| 15.00 | 0.5906 | 152.00 | 16.00 | 204.00 | $257.96 | Details |
| 16.00 | 0.6299 | 152.00 | 16.00 | 204.00 | $257.96 | Details |
| 17.00 | 0.6693 | 171.00 | 18.00 | 223.00 | $354.96 | Details |
| 18.00 | 0.7087 | 171.00 | 18.00 | 223.00 | $354.96 | Details |
| 19.00 | 0.7480 | 190.00 | 20.00 | 244.00 | $477.41 | Details |
| 20.00 | 0.7874 | 190.00 | 20.00 | 244.00 | $477.41 | Details |
Process Notes
What to Confirm Before Running 8D
Feed-In
Use a pilot hole, enter at low RPM/feed, then switch to full speed after the drill is supported. Avoid dwell in the hole.
Pilot Hole
Recommended. Pilot diameter should match the drill tolerance closely and guide at least 1.5-2D.
Cooling
Internal coolant at 30-50 bar with clean filtration is strongly recommended for chip evacuation.
RFQ Data
Include machine model, toolholder, coolant pressure, material hardness, hole depth, and whether the hole is blind or through.
RFQ Checklist
Quote 8D DIN 6537 coolant-thru drills faster
- Diameter list and quantities
- Work material and hardness
- Hole depth, blind/through condition, tolerance
- Coolant pressure, filtration, machine/toolholder
- Coating preference and annual quantity
FROM OUR WORKSHOP
Watch us grind and inspect our tools
Two videos filmed in our workshop: CNC tool grinding and dimensional inspection.
Measuring carbide end mills at 0.001 mm
Watch our ZOLLER inspection process for precision carbide end mills.
Watch on YouTube