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Description
CROSS SECTION 20×20 mm
LENGTH 125 mm
INSERT TNMG 1604rr
ANGLE κr 60°
Technical specifications of the MTENN 20X20-16 turning tool
| Technical data | |
|---|---|
| ISO designation | MTENN 20X20-16 |
| Shank height (h) | 20 mm |
| Shank width (b) | 20 mm |
| Overall length (L) | 125 mm |
| Functional overhang (f) | 10 mm |
| Entering angle (κr) | 60° |
| Clearance angle | 0° (negative) |
| Clamping system | ISO — combination (M) |
| Insert type | TNMG 1604rr |
| Cutting direction | N — neutral (both directions) |
| Manufacturer | Smoxh |
MTENN 20X20-16 turning tool – for longitudinal turning and profiling
20×20 mm indexable turning tool for a TNMG insert
Turning tool MTENN 20X20-16 is an indexable turning tool designed for external turning on conventional and CNC lathes. The shank with a 20×20 mm cross section and a length of 125 mm provides the rigidity required for industrial machining. The geometry with a 60° entering angle allows longitudinal turning in both feed directions, with good access to the machined surface.
In the combination clamping system (M), the TNMG 1604rr insert is held simultaneously by a top clamp and a pin in its hole. The negative geometry of the 60° triangular insert with 6 cutting edges is suitable for roughing and medium machining, providing high cutting edge strength and cost efficiency thanks to its double-sided design. The tool is compatible with TNMG 16 inserts in various carbide grades — select the grade to match the workpiece material.
Decoding the MTENN designation of the MTENN 20X20-16 turning tool
What the individual letters in the ISO designation mean
Decoding the designation MTENN
M
CLAMPING
Combination (M)
The top clamp and pin secure the insert simultaneously
T
INSERT SHAPE
60° triangle 60°
TNMG insert — negative, double-sided, 6 edges (3 per side)
E
ENTERING ANGLE
κr = 60°
Longitudinal turning — a good angular compromise
N
CLEARANCE ANGLE
α = 0° (neg.)
Negative geometry — double-sided inserts, edges on both sides
N
DIRECTION
Neutral (N)
Operation in both directions — neutral tool
Shank: 20×20 mm · Insert: TNMG 1604rr
Typical applications of the MTENN 20X20-16 turning tool
Cutting operations:
| ▸ | Longitudinal turning with profiling — the 60° angle provides good access to the workpiece profile |
| ▸ | Roughing and medium machining of steel and cast iron — negative TNMG geometry provides a stronger cutting edge and 2× as many edges |
| ▸ | External taper turning — machining tapered and contoured surfaces |
| ▸ | Turning in both directions — the neutral insert orientation allows turning to the left and right |
| ▸ | CNC production runs — quick insert replacement and repeatability |
Included
MTENN 20X20-16 package contents
Package contents:
| ✓ | Tool body MTENN 20X20-16 | 1 pcs |
| ✓ | Combination clamp (clamp + pin) | 1 pcs |
| ✓ | Hex key for insert replacement | 1 pcs |
| ✗ | TNMG 1604rr cutting insert (sold separately) | — |
Compatible TNMG 1604rr insert
TNMG 1604rr
The cutting insert is not included in the set — must be purchased separately. TNMG insert. Negative geometry means that the insert is double-sided and has 6 cutting edges, providing a stronger cutting edge and twice as many edges as a single-sided insert.
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 MTENN 20X20-16 turning tool
Instructions for combination clamping (M)
Insert replacement procedure step by step
1 Loosen the clamp
Loosen the clamping screw 2-3 turns
2 Clean the insert seat
Remove chips and debris
3 Install the insert
Fit onto the pin and press down
4 Tighten the clamp
Torque 3.5–5.0 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 (6 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 — MTENN 20X20-16
This tool accepts inserts TNMG 1604rr 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 60° entering angle provides good access to the workpiece profile. It is suitable for longitudinal turning, contour profiling, and recess machining.
The TNMG insert has negative geometry (clearance angle 0°), which means it is double-sided with 6 cutting edges. When one edge wears out, rotate or flip the insert to use the next edge — this significantly reduces tooling cost per part.
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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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