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Description
CROSS SECTION 25×25 mm
LENGTH mm
INSERT TNMG 1604rr
ANGLE κr 107.5°
Technical specifications of the MTQNR 25x25 16 turning tool
| Technical Data | |
|---|---|
| ISO designation | MTQNR 25x25 16 |
| Shank height (h) | 25 mm |
| Shank width (b) | 25 mm |
| Overall length (L) | mm |
| Entering angle (κr) | 107.5° |
| Clearance angle | 0° (negative) |
| Clamping system | ISO — combination (M) |
| Insert type | TNMG 1604rr |
| Cutting direction | R — right-hand |
| Manufacturer | Varel |
MTQNR 25x25 16 turning tool – for longitudinal turning with facing
Professional 25×25 mm indexable turning tool for a TNMG insert
Turning tool MTQNR 25x25 16 is a professional turning tool designed for external turning on conventional and CNC lathes. The shank with a cross section of 25×25 mm and a length of mm provides the rigidity required for industrial machining. The geometry with an entering angle of 107.5° enables longitudinal turning with facing.
The combination clamping system (M) ensures maximum clamping rigidity and quick replacement of the TNMG 1604rr insert. 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.
Typical applications of the MTQNR 25x25 16 turning tool
Cutting operations:
| ▸ | Longitudinal turning — the 107.5° angle provides stable cutting along the workpiece axis with light facing |
| ▸ | Roughing and medium machining of steel and cast iron — negative TNMG geometry provides maximum cutting edge strength and 2× more edges |
| ▸ | Machining shafts and bushings — a general-purpose tool for external turning of rotational parts |
| ▸ | Taper turning — machining tapered surfaces on CNC and conventional lathes |
| ▸ | CNC production runs — quick insert replacement and repeatable positioning |
Included
Package contents for MTQNR 25x25 16
Package contents:
| ✓ | Tool body MTQNR 25x25 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 maximum cutting edge strength and cost efficiency.
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 MTQNR 25x25 16 turning tool
Instructions for the combination clamping system (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 2.0–3.5 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 center height (±0.05 mm) |
| ▸ | 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 — MTQNR 25x25 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 entering angle of 107.5° provides stable longitudinal turning with light facing. The most popular angle for general-purpose machining on CNC and conventional lathes.
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.
Product accessories
Carbide insert TNMG 160408 R-S AE9025 Horn
Reference: 11266 In stock > 10 items
€5.13
€6.31 brutto
Carbide insert TNMG 160404 R-S AE9025 Horn
Reference: 0000008973 In stock > 10 items
€5.13
€6.31 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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