Polski 
- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
DIAMETER DØ13.5 mm
THICKNESS b4.0 mm
MATERIALHSS
STANDARDDIN 850 A
T-slot cutter 13.5x4.0 mm DIN 850 A HSS – dimensions and technical data
Tool specifications and key size
| TECHNICAL DATA | |
|---|---|
| Tool type | NFRh shank-type milling cutter |
| Standard | DIN 850 A |
| Cutting diameter D | Ø13.5 mm |
| Cutting section width b | 4.0 mm |
| Shank diameter d | Ø12.0 mm |
| Shank length l | 39.5 mm |
| Overall length L | 61.0 mm |
| Number of cutting edges z | 6, straight teeth |
| Material | HSS |
| Key size | 4x5 per DIN 6888 |
T-slot cutter for metal 13.5x4.0 mm – construction and Ø12.0 mm shank
Tool construction and application limits
The 13.5x4.0 mm T-slot cutter per DIN 850 A cuts a Woodruff keyseat with a single plunge of the disc. It is listed in catalogs as NFRh; the Ø13.5 mm disc, 4.0 mm thick, enters the shaft radially, forming the slot without travel along the axis or tool overtravel.
Cutting edges only on the disc – why the cutter cannot plunge axially
Six straight cutting edges work around the disc periphery and on both faces. The neck behind the disc has no cutting edges yet transmits all the cutting torque – the cutter must therefore be plunged radially only; axial entry, as with a drill, breaks the neck.
T-slot cutter or cutter for T-slots – what the standard says
Two standards, two applications: DIN 850 describes cutters for Woodruff keyseats per DIN 6888, DIN 851 cutters for T-slots per DIN 650. The common trade name covers both types, so the standard number determines which tool to order.
Applications of the 13.5x4.0 mm T-slot cutter – keyseats in shafts
Selecting the tool to match the key size
The Ø13.5 mm cutter cuts a slot with a diameter of 13 mm for a Woodruff key 4x5 per DIN 6888. The extra 0.5 mm is the slot tolerance zone specified by the standard. The keyseat depth in the shaft is 3.5 mm in series A and 4.1 mm in series B. The standard assigns this key to shaft ends Ø10–12 mm, when it transmits torque, and Ø17–22 mm, when torque is transmitted through another connection and the key only locates the angular position.
▲
Application limitation
Clamping: collet ER-32 with an insert for Ø12.0 mm. The plain straight shank has no clamping flat – with the disc fully engaged, a drill chuck can release the tool and ruin the slot. Uncoated HSS works up to approximately 275 HB; above this, use the HSSE (HSS-Co5) version.
T-slot cutter cutting data – spindle speed and feed for 13.5x4.0 mm
Conservative values by ISO 513 groups
| Workpiece material | vc [m/min] | fz [mm/tooth] | n [rpm] | vf [mm/min] |
|---|---|---|---|---|
| P Structural steel up to 275 HB | 20–30 | 0.023–0.038 | 472–707 | 65–161 |
| P Quenched and tempered alloy steel | 15–25 | 0.023–0.038 | 354–589 | 49–134 |
| M Stainless steel 304 / 316 | 9–18 | 0.023–0.043 | 212–424 | 29–109 |
| K Gray cast iron | 18–30 | 0.023–0.043 | 424–707 | 59–182 |
| N Aluminum, brass | 25–50 | 0.023–0.048 | 589–1179 | 81–340 |
Calculating spindle speed and feed for structural steel
Use vc = 25 m/min. Spindle speed: n = 1000 × 25 / (π × 13.5) ≈ 589 rpm. Feed rate with 6 cutting edges and fz = 0.030 mm: vf = 589 × 0.030 × 6 ≈ 106 mm/min. The disc cuts across its full width in an enclosed channel, so supply plenty of coolant along the slot to flush out chips.
T-slot cutter 13.5x4.0 mm – frequently asked questions
Selection, clamping and slot dimensions
Frequently asked questions
Woodruff key 4x5 per DIN 6888 – a segment with a diameter of 13 mm and a width of 4.0 mm.
collet ER-32 with an insert for Ø12.0 mm. A drill chuck will not hold the tool with the disc fully engaged.
No. T-slots per DIN 650 are cut with cutters DIN 851 – type NFRs in our range, for example T-slot cutter NFRs 18x8 DIN 851.
No. The neck behind the disc has no cutting edges and does not cut – axial entry breaks it. Feed the disc radially into the material, slowly and with coolant.
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
Viewed products
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.