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Description
CROSS SECTION 20×20 mm
LENGTH 125 mm
INSERT SCMT 1204rr
ANGLE κr 45°
Technical specifications of the SSDCN 20X20 12 turning tool
| Technical data | |
|---|---|
| ISO designation | SSDCN 20X20 12 |
| Shank height (h) | 20 mm |
| Shank width (b) | 20 mm |
| Overall length (L) | 125 mm |
| Functional overhang (f) | 10 mm |
| Entering angle (κr) | 45° |
| Clearance angle | 7° (pos.) |
| Clamping system | ISO — center screw (S) |
| Insert type | SCMT 1204rr |
| Cutting direction | N — neutral (both directions) |
| Manufacturer | Smoxh |
SSDCN 20X20 12 turning tool – for longitudinal turning and facing
20×20 mm indexable turning tool for an SCMT insert
Turning tool SSDCN 20X20 12 is an indexable turning tool designed for external turning on conventional and CNC lathes. The shank, with a cross section of 20×20 mm and a length of 125 mm, provides the rigidity required for industrial machining. The geometry with an entering angle of 45° allows simultaneous longitudinal turning and angled facing.
In the center screw clamping system (S), the screw secures the SCMT 1204rr insert through its hole, so replacement requires loosening just one screw. The positive geometry of the 90° square insert with 4 cutting edges is suitable for finishing, providing low cutting forces and a smooth machined surface. The tool is compatible with SCMT 12 inserts in various carbide grades — select the grade to match the workpiece material.
Decoding the SSDCN designation of the SSDCN 20X20 12 turning tool
What the individual letters in the ISO designation mean
Decoding the designation SSDCN
S
CLAMPING
Center screw (S)
The screw secures the insert through its center hole
S
INSERT SHAPE
Square 90° 90°
SCMT insert — positive, single-sided, 4 edges
D
ENTERING ANGLE
κr = 45°
Longitudinal turning + facing at 45°
C
CLEARANCE ANGLE
α = 7° (pos.)
Positive geometry — low cutting forces, finishing and medium machining
N
DIRECTION
Neutral (N)
Operation in both directions — neutral tool
Shank: 20×20 mm · Insert: SCMT 1204rr
Typical applications of the SSDCN 20X20 12 turning tool
Cutting operations:
| ▸ | Longitudinal turning with facing — the 45° angle allows simultaneous cutting along the axis and facing |
| ▸ | Medium machining and finishing — positive SCMT geometry provides low cutting forces |
| ▸ | Chamfering and external tapers — the 45° angle corresponds to a 45° chamfer |
| ▸ | Turning steps and shoulders — machining cylindrical surfaces with changes in diameter |
| ▸ | CNC production runs — quick insert replacement and repeatable positioning |
Included
SSDCN 20X20 12 package contents
Package contents:
| ✓ | Tool body SSDCN 20X20 12 | 1 pcs |
| ✓ | Center screw for clamping the insert | 1 pcs |
| ✓ | Hex key for insert replacement | 1 pcs |
| ✗ | SCMT 1204rr cutting insert (sold separately) | — |
Compatible SCMT 1204rr insert
SCMT 1204rr
The cutting insert is not included in the set — must be purchased separately. SCMT insert. Positive geometry means that the insert is single-sided and has 4 cutting edges, providing low cutting forces and good surface quality.
Select the insert grade to match the workpiece material: P (structural steels), M (stainless steel), K (cast iron), N (aluminum). You can find compatible inserts in the section "Related products" below.
Insert installation and replacement for the SSDCN 20X20 12 turning tool
Instructions for the center screw clamping system (S)
Insert replacement procedure step by step
1 Unscrew the screw
Unscrew the center screw 2-3 turns
2 Clean the insert seat
Remove chips and debris
3 Install the insert
Position in the seat
4 Tighten the screw
Torque 1.5–2.5 Nm
Important: Do not exceed the recommended tightening torque — this may damage the thread in the seat or crack the insert.
Checks before starting work:
| ▸ | Tool overhang — do not exceed 1.5× the shank height without support |
| ▸ | Cutting edge height — set the cutting edge at spindle centerline height |
| ▸ | Insert seat condition — check that the contact surface is not damaged or worn |
| ▸ | Secure clamping — the insert must have no play in the seat |
| ▸ | Indexing — when an edge wears out, rotate the insert to a fresh edge (4 edges in total) |
Note: Use coolant during machining — it extends insert life and improves surface finish. When machining without coolant, reduce the cutting parameters by 20–30%.
Frequently asked questions — SSDCN 20X20 12
This tool accepts inserts SCMT 1204rr in any carbide grade. Select the grade to match the workpiece material: P (steels), M (stainless steel), K (cast iron), N (aluminum). You can find compatible inserts in the "Related products" section below.
The entering angle of 45° allows simultaneous longitudinal turning and facing at 45°. Suitable for machining chamfers, tapers and transitions between diameters.
The SCMT insert has positive geometry (clearance angle 7°), which means it is single-sided with 4 cutting edges. When one edge wears out, rotate the insert to a fresh edge.
Product accessories
Carbide insert SCMT 120408 H6310 Horn
Reference: 0000006091 In stock > 10 items
€7.37
€9.06 brutto
Carbide insert SCMT 120404 H6018 Horn
Reference: 0000004453 In stock > 10 items
€7.37
€9.06 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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