GROOVING AND PARTING-OFF BLADE FOR GL INSERTS, FOR MS-EN TOOL HOLDER_GLS BS
Caution
Product Description
Modular grooving and parting-off blade from Pramet (Dormer Pramet) designed for GL inserts and fitted into MS-EN modular tool holders. Available in pocket sizes GL2 to GL6 for cutting widths of 2.00 to 6.00 mm, with a maximum cutting depth (CDX) of 24 mm. Blades are treated for longer tool life.
How to read the ordering code (example: GL2-S29CBS)
- GL: tool group (Pramet GL grooving and parting-off system)
- 2: pocket size (GL2 inserts)
- S: steel shank without internal coolant
- 29: shank height H in mm
- C: blade total length LF = 50 mm
- BS: modular blade
Compatible MS-EN modular tool holders
MS-EN-2020 K, MS-EN-2020 KS, MS-EN-2525 M, MS-EN-2525 MS, MS-EN-3225 P and MS-EN-3225 PS. The smaller holders MS-EN-1212 F and MS-EN-1616 H are not listed for GL BS blades.
Usage guidance
- Use GL inserts with the same pocket size as the blade, for example GL3-S29CBS with GL3 inserts.
- Choose a tool holder with the largest possible cross-section and the smallest possible overhang to reduce vibration.
- Apply coolant directly to the cutting edge in sufficient quantity to lower the temperature of the cutting edge and insert seat and extend tool life.
- When parting-off or deep grooving, set the cutting edge slightly above the workpiece centre line to reduce vibration.
- For parting-off and deep grooving, use inserts with PM or PR chip breakers, which form spiral-shaped chips.
The Pramet GLS BS series is a modular grooving and parting-off blade designed for GL inserts. The short blade, with a functional length (LF) of 50 mm and a shank height (H) of 29 mm, is mounted in an MS-EN modular tool holder, which is the Dormer Pramet holder for BS type grooving and parting-off blades.
Key features
- Designed for Pramet GL grooving and parting-off inserts, with pocket sizes GL2, GL3, GL4, GL5 and GL6
- Cutting width (CW) of 2.00, 3.00, 4.00, 5.00 or 6.00 mm according to pocket size
- Maximum cutting depth (CDX) of 24 mm and functional height (HF) of 24 mm on every size
- Steel shank without internal coolant; blades treated for longer tool life
- Listed by the manufacturer for finishing, medium machining and roughing, in both stable and unstable working conditions
Applications
External radial grooving and parting-off on lathes and turning centres, using GL inserts with the grade and geometry matched to the workpiece material.
| Brand | Pramet (Dormer Pramet) |
|---|---|
| Series | GLS BS |
| Product type | Modular grooving and parting-off blade |
| Compatible inserts | GL inserts, pocket sizes GL2 to GL6 |
| Compatible tool holder | MS-EN modular tool holder |
| Cutting width (CW) | 2.00 to 6.00 mm |
| Maximum cutting depth (CDX) | 24 mm |
| Shank height (H) | 29 mm |
| Functional height (HF) | 24 mm |
| Functional length (LF) | 50 mm |
| Shank type | Steel shank without internal coolant |
| Treatment | Blade treated for longer tool life |
| Operations | Grooving and parting-off (external) |
| Model | Cutting width CW (mm) | Max. cutting depth CDX (mm) | Shank height H (mm) | Functional height HF (mm) | Functional length LF (mm) | Weight (kg) | Compatible inserts |
|---|---|---|---|---|---|---|---|
| GL2-S29CBS | 2.00 | 24 | 29 | 24 | 50 | 0.01 | GL2 inserts |
| GL3-S29CBS | 3.00 | 24 | 29 | 24 | 50 | 0.02 | GL3 inserts |
| GL4-S29CBS | 4.00 | 24 | 29 | 24 | 50 | 0.02 | GL4 inserts |
| GL5-S29CBS | 5.00 | 24 | 29 | 24 | 50 | 0.03 | GL5 inserts |
| GL6-S29CBS | 6.00 | 24 | 29 | 24 | 50 | 0.04 | GL6-D600 and GL6-D800 inserts |
Short, flat modular blade with an insert pocket at the front end that holds a GL insert. The blade is clamped in the MS-EN modular tool holder. Main dimensions (same for all sizes unless noted):
- H (shank height): 29 mm
- LF (functional length): 50 mm
- HF (functional height): 24 mm
- CDX (maximum cutting depth): 24 mm
- CW (cutting width): 2.00 / 3.00 / 4.00 / 5.00 / 6.00 mm, according to pocket size GL2 / GL3 / GL4 / GL5 / GL6
Choosing the blade size
All blades in this series share the same CDX 24 mm, H 29 mm and LF 50 mm, so the choice depends mainly on the required groove width. The pocket size in the code (GL2 to GL6) must match the size of the GL insert.
Choosing the GL insert geometry
| Geometry | Recommended use |
|---|---|
| PM | Highly positive rake. First choice for parting-off with continuous to slightly interrupted cuts; suits low to medium feeds on soft materials such as austenitic stainless steel and reduces the burr when parting-off tubes. |
| PR | Negative T-land. First choice for difficult grooving and parting-off with continuous to interrupted cuts; suits medium to high feeds and parting-off of solid bars. |
| GM | Versatile geometry for grooving and longitudinal turning with continuous to interrupted cuts. |
Choosing the insert grade
| Grade | Coating | ISO application range | Characteristics |
|---|---|---|---|
| G8330 | PVD | P25 - P40, M20 - M35, K20 - K40, S15 - S25 | Universal grade for grooving and parting-off with high reliability and versatility; suitable for steel, stainless steel and cast iron. |
| T7325 | MT-CVD | P15 - P35, M10 - M25, K15 - K25, S10 - S25 | One of the most universal turning grades, designed especially for stainless steel, with a good balance between wear resistance and reliability. |