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BEYOND S16Q-STWNR16 Internal Boring Bar 16mm Shank 180mm Length Screw Fastened Right Hand 60-Degree TNMG 1604 Lathe Turning Tool Holder
$18.52 USD
⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric clearance,...
BEYOND STWNR/L CNC Boring Bar – Screw Clamp External Turning Toolholder
The BEYOND STWNR/L boring bar series is designed for high-stability external turning using the screw-clamp (S-type) insert holding system. Manufactured with a durable steel shank, these toolholders follow ISO coding standards and are optimized for TNMG turning inserts. Suitable for general steel, alloy steel, stainless steel, and cast iron machining.
ISO Code Interpretation
| ISO Position | Meaning | Description |
|---|---|---|
| 1st Letter | Type of Bar | S = Steel shank (A: steel w/ coolant; E: carbide head; C: carbide shank; X: special) |
| 2 Numbers | Bar Diameter | Shank size in mm (e.g., 16 = 16 mm, 20 = 20 mm, 25 = 25 mm) |
| Next Letter | Bar Length Code | A:32, B:40, C:50, D:60, E:70, F:80, G:90, H:100, J:110, JX:120, K:125, L:140, M:150, N:160, P:170, Q:180, R:200, S:250, T:300, U:350, V:400, W:450, Y:500, X: Special |
| Letter after hyphen (1st) | Clamping Method | S = Screw clamp |
| Letter after hyphen (2nd) | Insert Shape | T = Triangle |
| Letter after hyphen (3rd) | Cutting Edge Angle | W = 60° entering angle |
| Letter after hyphen (4th) | Insert Relief Angle | N = 0° Negative (B:5°, C:7°, D:15°, E:20°, P:11°) |
| Letter after hyphen (5th) | Hand of Tool | R = Right-hand, L = Left-hand, N = Neutral |
| Last Digits | Insert Cutting Edge Length | Typically 16 → TNMG16 inserts |
Compatible Inserts
This toolholder uses **TNMG + last two digits** insert specification:
- SxQ-STWNR16 → TNMG16
- SxQ-STWNL16 → TNMG16
Recommended Insert Models:
- TNMG160404
- TNMG160408
- TNMG160412
- TNMG160408-PM / PF / MA (depending on material)
Available STWNR/L Boring Bar Models
| Model | Shank Diameter (mm) | Length Code | Hand | Insert Size | Clamping |
|---|---|---|---|---|---|
| S16Q-STWNR16 | 16 | Q = 180 mm | R (Right-hand) | TNMG16 | Screw Clamp (S) |
| S16Q-STWNL16 | 16 | Q = 180 mm | L (Left-hand) | TNMG16 | Screw Clamp (S) |
| S20R-STWNR16 | 20 | R = 200 mm | R | TNMG16 | Screw Clamp |
| S20R-STWNL16 | 20 | R = 200 mm | L | TNMG16 | Screw Clamp |
| S25S-STWNR16 | 25 | S = 250 mm | R | TNMG16 | Screw Clamp |
| S25S-STWNL16 | 25 | S = 250 mm | L | TNMG16 | Screw Clamp |
Key Features
- ISO-standard STWNR/L external turning boring bar
- Durable steel shank for high rigidity and stability
- Screw-clamp system ensures reliable insert retention
- Optimized for TNMG triangular negative inserts
- Suitable for roughing and semi-finishing
- Excellent chip evacuation and vibration resistance
- Ideal for CNC lathes and automatic turning centers
Applications
- General steel turning (AISI 1045, 4140, 1020, etc.)
- Alloy steel and tool steel
- Stainless steel (304/316/420)
- Cast iron machining (FC/ FCD)
- Medium-depth external profiling & facing
Search Keywords
STWNR boring bar, STWNL toolholder, TNMG toolholder, CNC turning holder, screw clamp turning bar, external turning tool, steel shank toolholder, ISO turning tool, lathe turning bar, TNMG16 holder, negative insert toolholder, BEYOND toolholder, CNC boring bar steel shank.