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Description
DIAMETER DØ21 mm
THICKNESS b9 mm
INSERTSCCMT 0602rr
STANDARDIndexable milling cutter
Indexable T-slot cutter 21x9 mm with CCMT 0602rr inserts – technical data
Tool specifications and replaceable inserts
| TECHNICAL DATA | |
|---|---|
| Tool type | Indexable T-slot cutter |
| Standard | – |
| Cutting diameter D | Ø21 mm |
| Cutting section width b | 9 mm |
| Neck diameter d1 | Ø10 mm |
| Shank diameter d | Ø25.0 mm |
| Overall length L | 100 mm |
| Number of inserts z | 2 |
| Interchangeable inserts | CCMT 0602rr |
| Material | steel body, carbide inserts |
| T-slot | 12 mm per DIN 650 |
T-slot cutter 21x9 mm with replaceable inserts – construction and insert replacement
Body, inserts and clamping
The 21x9 mm indexable T-slot cutter is a tool with replaceable carbide inserts CCMT 0602rr, operating with 2 cutting edges. Unlike HSS cutters, it is not resharpened – a worn insert is replaced with a new one, while the body with its Ø25.0 mm shank remains in service. The Ø21 mm disc, 9 mm thick, widens the lower section of the slot to form a T-profile.
Replaceable inserts and their handling
CCMT 0602rr inserts are secured with a screw on the face of the disc. The last two digits of the designation (rr) indicate the corner radius – specify the required value when ordering, e.g., 04 for r = 0.4 mm. During replacement, remove chips from the insert pocket and tighten the screw to the manufacturer's specified torque – overtightening shears off the head, while insufficient tightening allows the insert to fall out into the slot. Carbide allows cutting speeds many times higher than HSS but requires rigid clamping and a constant feed: interrupted cutting and vibration chip the cutting edge.
T-slot 12 mm per DIN 650 – applications of the 21x9 mm cutter
Machining allowances and tool entry
The disc dimensions match a 12 mm T-slot per DIN 650 – the lower section of the slot is 19–21 mm wide and 8–9 mm high. The cutter removes 3.50 mm from each side of the straight slot previously machined with an end mill. The tool enters the material only along the existing slot; the Ø10 mm neck has no cutting edges and does not cut axially.
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Application limitation
Clamping: Ø25.0 mm straight shank – a holder with a bore of this diameter is required, as the ER-32 collet range ends at Ø20 mm. The cutting speed is selected according to the insert grade, not the body – values are provided in the insert manufacturer's grade data sheet. Do not use HSS cutter settings: carbide settings are several times higher and require a rigid machine when cutting with the full disc width.
Operating parameters for the 21x9 mm indexable milling cutter
Spindle speed, feed and selection by insert grade
| Workpiece material | vc [m/min] | fz [mm/tooth] | n [rpm] | vf [mm/min] |
|---|---|---|---|---|
| P Structural and alloy steel | 130–200 | 0.07–0.14 | 1970–3032 | 276–849 |
| M Stainless steel 304 / 316 | 70–100 | 0.07–0.14 | 1061–1516 | 149–424 |
| K Gray cast iron GG20–GG30 | 150–250 | 0.07–0.14 | 2274–3789 | 318–1061 |
| N Aluminum, brass | 200–350 | 0.07–0.14 | 3032–5305 | 424–1485 |
Calculating spindle speed for an indexable milling cutter
Spindle speed is calculated in the same way as for HSS tools, but with a higher cutting speed. For vc = 130 m/min and a diameter of 21 mm, the result is n = 1000 × 130 / (π × 21) ≈ 1970 rpm, and the feed rate with 2 inserts and fz = 0.07 mm is vf ≈ 276 mm/min. For stainless steel, reduce to vc = 70–100 m/min as shown in the table above.
Indexable T-slot cutter 21x9 mm – frequently asked questions
Inserts, clamping and slot
Frequently asked questions
Carbide inserts in size CCMT 0602rr, 2 pcs per tool. The grade is selected according to the workpiece material – the same body accepts inserts for steel and cast iron.
In a holder with a Ø25.0 mm bore. An ER-32 collet does not accommodate this diameter – its range ends at Ø20 mm.
A slot 12 mm per DIN 650: the lower section of the slot is 19–21 mm wide and 8–9 mm high. The cutter removes 3.50 mm from each side.
No. Like any T-slot cutter, it must travel along a previously machined straight slot – the Ø10 mm neck has no cutting edges. Machine the straight slot to full depth with an end mill.
Product accessories
Carbide insert CCMT 060202 H6310 Horn
Reference: 0000006504 In stock > 10 items
€3.16
€3.88 brutto
Carbide insert CCMT 060204 H6310 Horn
Reference: 0000005754 In stock > 10 items
€3.16
€3.88 brutto
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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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