55° Partial Profile Laydown Threading Inserts – A55 / AG55 / G55 / N55 / Q55 Series
Features
- Product Type: Premium 55° Partial Profile laydown threading inserts (Whitworth/BSP).
- Universal Efficiency: The versatile 16er ag55 threading insert covers a wide pitch range of 48 – 8 TPI (0.5 – 3.0mm) in a single tool.
- Machine Compatibility: High-performance threading inserts for lathe operations, suitable for steel, stainless steel, and cast iron.
- Size Options: Stocked in all standard sizes, including the popular 16er threading inserts (3/8″ I.C.) and micro-boring sizes.
- Directional Flexibility: Available in standard right-hand and left hand thread insert (EL/IL) models for comprehensive CNC machining.
Contact our sales team to discover all of your pricing options.
Product Overview
Maximize your workshop’s efficiency with our 55° Partial Profile laydown threading inserts. Specifically engineered for 55° British Standard threads (such as BSW, BSF, and BSP/G), these tools feature a non-topping geometry.
Unlike full profile tools, these threading inserts for lathe applications cut the thread groove without modifying the major or minor diameter. This design allows a single insert grade to machine multiple pitches, significantly optimizing your tool inventory.
Key Features & Benefits
- The “Universal” 55° Solution: Our 16er ag55 threading insert is the industry standard for versatility, capable of machining pitches from 0.5mm to 3.0mm (48-8 TPI) without a tool change.
- Broad Inventory: We supply a complete range of threading inserts, from small 5/32″ I.C. inserts for internal boring up to heavy-duty 5/8″ I.C. tools.
- Reverse Machining: To meet all turning requirements, we offer specific left hand thread insert options (such as 16EL AG55) alongside standard right-hand tools.
- Standard Compatibility: fully compatible with standard 16er threading inserts tool holders and boring bars.
55° External Threading Insert Table
| I.C. | Pitch (mm) | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|---|
| 3/8″ | 0.5-1.5 | 48-16 | 16ERA55 | 16ELA55 | 16 | 0.6 | 0.8 |
| 3/8″ | 1.75-3.0 | 14-8 | 16ERG55 | 16ELG55 | 16 | 1.1 | 1.5 |
| 3/8″ | 0.5-3.0 | 48-8 | 16ERAG55 | 16ELAG55 | 16 | 1.1 | 1.5 |
| 1/2″ | 3.5-5.0 | 7-5 | 22ERN55 | 22ELN55 | 22 | 1.8 | 2.5 |
| 5/8″ | 5.5-6.0 | 4.5-4 | 22ERQ55 | 22ELQ55 | 27 | 2 | 2.9 |
55° Internal Threading Insert Table
| I.C. | Pitch (mm) | Pitch (TPI) | Right-hand | Left-hand | L | X | Y |
|---|---|---|---|---|---|---|---|
| 5/32″ | 0.5-1.5 | 48-16 | 06IRA55 | 6 | 0.6 | 0.6 | |
| 3/16″ | 0.5-1.5 | 48-16 | 08IRA55 | 8 | 0.6 | 0.7 | |
| 1/4″ | 0.5-1.5 | 48-16 | 11IRA55 | 11ILA55 | 11 | 0.6 | 0.8 |
| 1/4″ | 0.5-1.5 | 48-16 | 16IRA55 | 16ILA55 | 16 | 0.6 | 0.8 |
| 3/8″ | 1.75-3.0 | 14-8 | 16IRG55 | 16ILG55 | 16 | 1.1 | 1.5 |
| 3/8″ | 0.5-3.0 | 48-8 | 16IRAG55 | 16ILAG55 | 16 | 1.1 | 1.5 |
| 1/2″ | 3.5-5.0 | 7-5 | 22IRN55 | 22ILN55 | 22 | 1.8 | 2.5 |
| 5/8″ | 5.5-6.0 | 4.5-4 | 27IRQ55 | 27ILQ55 | 27 | 2 | 2.9 |
(Note: Internal threading models replace “ER” with “IR”. Left-hand models replace “R” with “L”, e.g., 16EL AG55.)
Machining Tips
-
Application: Strictly for 55° thread forms (Whitworth/BSP). For 60° Metric/UN threads, please see our 16er ag60 threading insert series.
-
Pre-Turning: As these are non-topping threading inserts, ensure the workpiece diameter is turned to the final size before threading.
Need a consultation? Contact us！
Contact our sales team to discover all of your pricing options
