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Description
DIAMETER DØ18 mm
THICKNESS b8.0 mm
MATERIALHSS
STANDARDDIN 851
T-slot cutter NFRs 18x8.0 mm DIN 851 HSS – dimensions and technical data
Tool specifications and slot size
| TECHNICAL DATA | |
|---|---|
| Tool type | T-slot cutter NFRs |
| Standard | DIN 851 |
| Cutting diameter D | Ø18 mm |
| Cutting section width b | 8.0 mm |
| Shank | straight |
| Shank length l | 40 mm |
| Overall length L | 65 mm |
| Number of cutting edges z | 6, straight teeth |
| Material | HSS |
| T-slot | 10 mm per DIN 650 |
T-slot cutter 18x8.0 mm for T-slots – NFRs construction
Disc, neck and operating method
T-slot cutter NFRs 18x8.0 mm per DIN 851 widens the lower portion of the slot to a “T” profile in milling machine tables, fixture plates and pallets. The Ø18 mm disc, 8.0 mm thick, cuts with its periphery and both faces, while the narrower neck guides it through the previously machined slot.
Slot width and tool rigidity
The disc diameter determines the width of the lower portion of the slot, and the 8.0 mm thickness determines its height. The tool cuts with its periphery and both faces at once, so cutting forces increase with every millimeter of entry into the material. Maintain a constant feed without stopping in the slot: dwelling under load wears the cutting edge and leaves a polished mark on the wall. For vc = 25 m/min, the spindle speed is approximately 442 rpm.
T-slot 10 mm per DIN 650 – applications of the 18x8.0 mm cutter
Operation sequence and allowances
The NFRs 18x8.0 mm cutter is a tool for a 10 mm T-slot per DIN 650: the lower, wide portion of the slot measures 16–18 mm, its height is 7–8 mm, and the overall slot depth is 17–21 mm.
Operation sequence for cutting a T-slot
A T-slot is produced in three operations. First, machine a straight slot to full depth with an end mill or slotting cutter per DIN 327. Then widen the lower portion with this cutter, feeding it along the existing slot. The cutter removes 3 mm of material from each side of the previously machined straight slot. Finally, a 45° chamfer at the slot entrance. A T-slot cutter does not cut axially – the neck has no cutting edges, so plunging into solid material breaks it off.
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Application limitation
The tool works only in a previously machined guide slot; the neck, smaller in diameter than the disc, transmits all the cutting torque and is the weakest component. Clamping: collet ER-32 matched to the shank diameter. Uncoated HSS works in materials up to approximately 275 HB – cast iron and structural steel tables fall within this range.
NFRs cutter cutting data – spindle speed and feed for 18x8.0 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 | 354–531 | 49–121 |
| P Quenched and tempered alloy steel | 15–25 | 0.023–0.038 | 265–442 | 37–101 |
| M Stainless steel 304 / 316 | 9–18 | 0.023–0.043 | 159–318 | 22–82 |
| K Gray cast iron | 18–30 | 0.023–0.043 | 318–531 | 44–137 |
| N Aluminum, brass | 25–50 | 0.023–0.048 | 442–884 | 61–255 |
Calculating spindle speed and feed for structural steel
Starting point: vc = 25 m/min. The formula n = 1000 × vc / (π × D) gives 442 rpm, and the feed rate at fz = 0.030 mm with 6 cutting edges is 80 mm/min. Full-width cutting traps chips in the slot – without abundant coolant, they pass back under the cutting edge and chip it.
T-slot cutter NFRs 18x8.0 mm – frequently asked questions
Slot selection, operation sequence, clamping
Frequently asked questions
The NFRs 18x8.0 mm cutter is a tool for a 10 mm T-slot per DIN 650: the lower, wide portion of the slot measures 16–18 mm, its height is 7–8 mm, and the overall slot depth is 17–21 mm.
No. The neck between the disc and the shank has no cutting edges, so the tool must travel along a previously machined straight slot. Axial plunging breaks off the neck.
collet ER-32 matched to the shank diameter.
DIN 650 specifies a 45° chamfer at the slot opening (dimension n). It removes the sharp edge that would chip under the T-bolt head and hinder insertion of nuts.
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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 |
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