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BEYOND S20R-MDUNR11 (0.787" / 20mm Shank) Indexable Internal Boring Bar | Right-Hand 93° CNC Lathe Turning Tool Holder
$22.36 USD
BEYOND S20R-MDUNR11 Right-Hand Indexable Internal Boring Bar (20mm Shank) for High-Rigidity 93° CNC Lathe Step Boring and Internal Turning Operations ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide insert shown mounted...
BEYOND S20R-MDUNL11 (0.787" / 20mm Shank) Indexable Internal Boring Bar | Left-Hand 93° CNC Lathe Turning Tool Holder
$20.33 USD
BEYOND S20R-MDUNL11 Left-Hand Indexable Internal Boring Bar (20mm Shank) for High-Rigidity 93° CNC Lathe Step Boring and Internal Turning Operations ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide insert shown mounted...
BEYOND S32T-MDUNR15 (32mm / 1.260" Shank) Indexable Internal Boring Bar | Right-Hand 93° Lead Angle CNC Lathe Through-Boring DNMG1506 Turning Tool Holder
$55.34 USD
BEYOND S32T-MDUNR15 Right-Hand Indexable Internal Boring Bar (32mm Shank) for Heavy-Duty 93° Lead Angle CNC Lathe Through-Boring, Facing, and Rigid DNMG1506 Turning Operations ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide...
BEYOND S32T-MDUNL15 (32mm / 1.260" Shank) Indexable Internal Boring Bar | Left-Hand 93° Lead Angle CNC Lathe Through-Boring DNMG1506 Turning Tool Holder
$55.34 USD
BEYOND S32T-MDUNL15 Left-Hand Indexable Internal Boring Bar (32mm Shank) for Heavy-Duty 93° Lead Angle CNC Lathe Through-Boring, Facing, and Rigid DNMG1506 Turning Operations ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide...
BEYOND S25S-MDUNR15 Right-Hand Indexable Boring Bar (25mm / 0.984" Shank, 93° Approach)
$31.42 USD
BEYOND S25S-MDUNR15 Right-Hand Indexable Internal Boring Bar (25mm Shank) for High-Rigidity 93° CNC Lathe Heavy-Duty Internal Turning, Complex Profiling, and Through-Hole Boring ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide insert...
BEYOND S25S-MDUNL15 Left-Hand Indexable Boring Bar (25mm / 0.984" Shank, 93° Approach)
$31.42 USD
BEYOND S25S-MDUNL15 Left-Hand Indexable Internal Boring Bar (25mm Shank) for High-Rigidity 93° CNC Lathe Heavy-Duty Internal Turning, Complex Profiling, and Through-Hole Boring ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide insert...
BEYOND S25R-MDUNR11 (25mm / 0.984" Shank) Indexable Internal Boring Bar | Right-Hand 93° CNC Lathe Medium-Heavy Profiling Tool Holder
$32.89 USD
BEYOND S25R-MDUNR11 Right-Hand Indexable Internal Boring Bar (25mm Shank) for Heavy-Duty 93° CNC Lathe Medium-Roughing, Internal Profiling, and 90-Degree Shoulder Turning Operations ⚠️ INDUSTRIAL PACKAGING NOTICE: The indexable carbide insert...
BEYOND MDUNR/L Internal Boring Bar Series – Complete Specification List
Brand: BEYOND
Series: MDUNR/L INTERNAL (steel-shank, lever-lock, DNMG inserts)
Key Search Tags
steel shank boring bar, MDUNR boring bar, MDUNL boring bar, DNMG 11 insert, DNMG 15 insert, internal boring tool, 95 degree approach angle, 0 degree relief angle, left hand boring bar, right hand boring bar, CNC lathe boring, heavy-duty boring bar, large diameter boring bar, BEYOND boring tools
Why Choose BEYOND MDUNR/L?
- Large-size range: 20 mm – 50 mm shank diameter
- Rigid steel shank (S) for deep-hole and heavy-duty cuts
- 95° approach angle (D) + 0° relief (N) = maximum edge strength
- Lever-lock clamp (U) for quick insert changes
- Left-hand (L) & right-hand (R) versions in stock
- Designed for DNMG 11 & DNMG 15 inserts (also accepts DNMA, DNMP)
Technical Data – All Models
| Part Number | Shank Ø mm | Length Code | Insert Size | Min. Bore Ø mm | Hand | Overall Length mm |
|---|---|---|---|---|---|---|
| S20R-MDUNL11 | 20 | R (200) | DNMG 1104 | 25 | L | 200 |
| S20R-MDUNR11 | 20 | R (200) | DNMG 1104 | 25 | R | 200 |
| S25R-MDUNR11 | 25 | R (200) | DNMG 1104 | 32 | R | 200 |
| S25S-MDUNL15 | 25 | S (250) | DNMG 1506 | 32 | L | 250 |
| S25S-MDUNR15 | 25 | S (250) | DNMG 1506 | 32 | R | 250 |
| S32T-MDUNL15 | 32 | T (300) | DNMG 1506 | 40 | L | 300 |
| S32T-MDUNR15 | 32 | T (300) | DNMG 1506 | 40 | R | 300 |
| S40T-MDUNL15 | 40 | T (300) | DNMG 1506 | 50 | L | 300 |
| S40T-MDUNR15 | 40 | T (300) | DNMG 1506 | 50 | R | 300 |
| S50U-MDUNR15 | 50 | U (350) | DNMG 1506 | 63 | R | 350 |
| S50V-MDUNR15 | 50 | V (400) | DNMG 1506 | 63 | R | 400 |
Insert & Spare Parts
- Insert: DNMG 1104 (for 11 models) / DNMG 1506 (for 15 models)
- Clamp lever: standard DN-style lever included
- Wrench: T15 Torx key supplied free with every bar
Application Ideas
- Heavy-duty boring of forged steel flanges
- Deep bores in wind-tower hubs
- Large gearbox housings – cast iron & steel
- Oil-field connector bores – 4140, 4340, F22
Shipping & Stock
Ships from California, USA & Dortmund, Germany. 98 % of models in stock – order before 3 pm local time for same-day dispatch.
Long-Tail Keywords
20 mm steel boring bar, DNMG 11 boring bar, DNMG 15 boring bar, MDUNR right hand boring bar, MDUNL left hand boring bar, 95 degree approach angle, 0 degree relief angle, heavy duty internal boring tool, large diameter boring bar, CNC lathe deep boring, BEYOND precision boring tools, steel shank boring bar supplier