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Description
CROSS SECTION 25×25 mm
LENGTH 150 mm
INSERT CNMG 1204rr
ANGLE κr 95°
Technical specifications of the PCLNR 25x25-12 turning tool
| Technical data | |
|---|---|
| ISO designation | PCLNR 25x25-12 |
| Shank height (h) | 25 mm |
| Shank width (b) | 25 mm |
| Overall length (L) | 150 mm |
| Functional overhang (f) | 32 mm |
| Entering angle (κr) | 95° |
| Clearance angle | 0° (negative) |
| Clamping system | ISO — lever/pin (P) |
| Insert type | CNMG 1204rr |
| Cutting direction | R — right-hand (L version available) |
| Manufacturer | Smoxh |
PCLNR 25x25-12 turning tool – for longitudinal turning with light facing
Indexable turning tool 25×25 mm for a CNMG insert
Turning tool PCLNR 25x25-12 is an indexable 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 150 mm, provides the rigidity required for industrial machining. The geometry with an entering angle of 95° allows turning along the wall with simultaneous light facing.
In the lever clamping system (P), a lever acts through the hole in the CNMG 1204rr insert to press it against the pocket walls. The negative geometry of the 80° rhombic insert with 4 cutting edges is suitable for roughing and medium machining, providing high cutting edge strength and cost efficiency through its double-sided design. The tool is compatible with CNMG 12 inserts in various carbide grades — select the grade to match the workpiece material.
Decoding the PCLNR designation of the PCLNR 25x25-12 turning tool
What the individual letters in the ISO designation mean
Decoding the designation PCLNR
P
CLAMPING
Lever/pin (P)
Clamping through the insert hole — quick replacement
C
INSERT SHAPE
80° rhombus 80°
CNMG insert — negative, double-sided, 4 cutting edges (2 per side)
L
ENTERING ANGLE
κr = 95°
Longitudinal turning + facing
N
CLEARANCE ANGLE
α = 0° (neg.)
Negative geometry — double-sided inserts, edges on both sides
R
DIRECTION
Right-hand (R)
Feed to the left — from the tailstock toward the spindle
Shank: 25×25 mm · Insert: CNMG 1204rr
Typical applications of the PCLNR 25x25-12 turning tool
Cutting operations:
| ▸ | Longitudinal turning — the 95° angle provides stable cutting along the workpiece axis with light facing |
| ▸ | Roughing and medium machining of steel and cast iron — negative CNMG geometry provides a stronger cutting edge 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 PCLNR 25x25-12
Package contents:
| ✓ | Tool body PCLNR 25x25-12 | 1 pcs |
| ✓ | Pin and clamping lever | 1 pcs |
| ✓ | Hex key for insert replacement | 1 pcs |
| ✗ | CNMG 1204rr cutting insert (sold separately) | — |
Compatible CNMG 1204rr insert
CNMG 1204rr
The cutting insert is not included in the set — must be purchased separately. CNMG insert. Negative geometry means that the insert is double-sided and has 4 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 PCLNR 25x25-12 turning tool
Instructions for lever clamping (P)
Insert replacement procedure step by step
1 Loosen the lever
Unscrew the lever screw 2-3 turns
2 Clean the insert seat
Remove chips and debris
3 Install the insert
Fit the hole over the pin
4 Tighten the lever
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 — PCLNR 25x25-12
This tool accepts inserts CNMG 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 95° provides stable longitudinal turning with light facing. A typical angle for general-purpose machining on CNC and conventional lathes.
The CNMG insert has negative geometry (clearance angle 0°), which means that it is double-sided with 4 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
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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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