- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
Cutting diameterØ10 mm
Pilot diameterØ5.5 mm
Shank diameterØ8 mm
For threadM5
M5 10×5.5 mm counterbore with pilot
Type NWCa · DIN 373 · high-speed steel (HSS) · Artykuly Techniczne brand
M5 10×5.5 mm counterbore with pilot (type NWCa), manufactured to DIN 373, is used to machine predrilled holes for cylindrical screw heads M5. The fixed pilot Ø5.5 mm guides the tool in the clearance hole, preventing lateral drift of the counterbore and ensuring repeatable perpendicularity of the seat to the hole axis. As a versatile M5 counterbore for metal performs well in steel, aluminum, copper, and brass. The tool bears the Polish brand Artykuly Techniczne — manufactured in Poland.
| Technical data | |
|---|---|
| Counterbore diameter D | 10 mm |
| Pilot diameter d₁ | 5.5 mm |
| Shank diameter d | 8 mm |
| Flute length l | 18 mm |
| Pilot length l₁ | 5 mm |
| Shank length l₂ | 35.5 mm |
| Overall length L | 80 mm |
| Number of cutting edges Z | 3 |
| For thread | M5 |
| Material | HSS |
| Standard | DIN 373 NWCa |
| Brand | Artykuly Techniczne |
| Country of manufacture | Poland |
Applications and workpiece materials
Applications and materials for the M5 counterbore
Typical applications:
| ✓ | Counterboring holes for cylindrical heads of M5 screws (DIN 912 / ISO 4762) |
| ✓ | Flat, perpendicular seat for the head and washer |
| ✓ | Spotfacing around the hole |
| ✓ | Use on CNC machines, drilling machines, and conventional machine tools |
Workpiece materials
✓Structural and carbon steels
✓Copper, brass, bronze
✓Aluminum and light alloys
▲Alloy and stainless steels — with coolant
✗Hardened steels above 45 HRC
Fixed pilot — centering and perpendicularity
Pilot Ø5.5 mm enters the clearance hole and guides the tool coaxially, keeping the counterbore perpendicular to the hole axis and allowing full surface contact under the screw head. Steel HSS retains its cutting hardness up to an operating temperature of approx. 600°C.
Cutting data
Guideline values for HSS · Ø10 mm
| Material group (ISO 513) | Vc [m/min] | fz [mm/tooth] | n [rpm] · Ø10 | f [mm/min] · Z=3 |
|---|---|---|---|---|
| PStructural and alloy steel | 5–25 | 0.03–0.10 | 160–800 | 15–240 |
| MStainless steel | 6–15 | 0.03–0.06 | 190–480 | 17–85 |
| KCast iron | 10–20 | 0.08–0.12 | 320–640 | 75–230 |
| NNonferrous metals (Al, Cu, brass) | 15–80 | 0.06–0.14 | 480–2550 | 85–1070 |
| SDifficult-to-machine alloys and titanium | 8 | 0.04 | ≈250 | ≈30 |
Vc — cutting speed, fz — feed per tooth. Columns n and f calculated for D = 10 mm and Z = 3 (rounded). For tools made of steel HSS-E the cutting parameters can be increased by 25%.
How n and f were calculated (Ø10, Z = 3)
Spindle speed n = (Vc × 1000) ÷ (π × D), feed rate per minute f = fz × Z × n. Example for steel (Vc = 20, fz = 0.1): n = 20 000 ÷ 31.4 ≈ 640 rpm, f = 0.1 × 3 × 640 ≈ 190 mm/min. Start at the lower end of the range and adjust according to the material and clamping rigidity.
Tips and limitations
How to extend tool life
HSS limitations
The tool is not intended for hardened steels above 45 HRC. For stainless and alloy steels, reduce the speed and use coolant — overheating accelerates cutting edge wear. Make sure the clearance hole diameter matches the pilot Ø5.5 mm.
Frequently asked questions
The M5 counterbore produces a flat seat for cylindrical heads of M5 screws, including DIN 912 / ISO 4762 socket head cap screws. The Ø5.5 mm pilot enters the clearance hole for M5 and centers the tool, while the Ø10 mm counterbore diameter matches the head diameter of an M5 socket head cap screw.
A counterbore (DIN 373) produces a flat-bottomed cylindrical seat for a cylindrical head, such as a socket head cap screw. A countersink (DIN 335) produces a 90° chamfer for a conical/countersunk head. Choose a counterbore for M5 socket head cap screws and a countersink for countersunk screws.
Yes — for ISO M materials (stainless steel), operate at a reduced cutting speed (Vc approx. 6–15 m/min) and use coolant to limit work hardening and overheating. Do not use the tool on hardened steels above 45 HRC.
Reviews
No customer reviews for the moment.
Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
Recommended for you
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.