Sandhog Tungsten Carbide Insert CNC Lathe Boring Bar
Product Description
The S25R-MVUNR16 is a high-performance internal turning tool designed for precision machining of bores, grooves, and contours. Engineered for rigidity and efficiency, it delivers superior surface finishes and dimensional accuracy across a wide range of materials, including steel, stainless steel, cast iron, and high-temperature alloys.
Key Advantages
High Rigidity - Minimizes vibration for stable, precise cuts
Optimized Chip Control - Prevents chip buildup for smooth operations
Extended Tool Life - Coated carbide inserts resist wear in tough conditions
Versatile Machining - Suitable for roughing to finishing operations
Efficient Coolant Delivery - Enhances cutting performance and heat management
Main Applications
- Heavy Machinery: Engine blocks, hydraulic cylinders
- Energy Sector: Valve bodies, turbine housings
- Automotive: Transmission parts, brake cylinders
- Aerospace: Landing gear, engine components
The S25R-MVUNR16 delivers exceptional precision and durability for internal turning operations across various industries. Its robust construction and optimized design ensure reliable performance in demanding machining applications, making it an efficient solution for achieving high-quality internal surfaces.

MVUNR/L |
Designation |
size / Размер |
Inserts |
Shim |
Pin |
Clamp |
Screw |
Wrench |
Тип |
dmin |
φd |
s |
L |
ℓ |
H |
α° |
Пластины |
Прокладка |
Штырь |
Зажим |
винт |
Ключ |
S25R-MVUNR/L16 |
38 |
25 |
20 |
200 |
50 |
23 |
12° |
VN**1604** |
X |
CTM510 |
HL2114 |
ML0625 |
L2.0,L3.0 |
S32S-MVUNR/L16 |
44 |
32 |
22 |
250 |
50 |
30 |
17° |
MV1603 |
CTM513 |
S40T-MVUNR/L16 |
54 |
40 |
27 |
300 |
60 |
38 |
15° |
S50U-MVUNR/L16 |
64 |
50 |
32 |
350 |
70 |
48 |
12° |










Company Profile
Ningbo SANHAN Alloy Material Co., Ltd. with years of experience in manufacture Turning Tool Holder ,Boring Bar ,Threading Tool holder , Grooving Tool Holder , Milling Tool Holder , Milling Cutter ,Drilling Tools , Threading Insert ,Grooving Insert , Turning insert , Milling insert as well as their spare parts etc.
Located in Ningbo-China, a port city with developed industries. We have strong design team and passed the ISO9001 Certification. Also, we have various kinds of processing equipment, including DMG Five- Axis Linkage High-Precision Machining Center. All can meet your requirements!
Warmly Welcome you to have a visit of our factory .
Turning Tool Holder Shipping:
Port |
Ningbo/Shanghai/Guangzhou/Hangzhou/Shenzhen/Xiamen |
Shipping |
By Air ,By Sea or By Express |
Shipping Time |
4-10days By Express |
Different Area many take different shipping days |
7-15days By Air |
25-55days By Sea |
Trade Terms |
FOB, CIF, EXW, CFR, DDU... |
FAQ:
Q: Are you a factory or a trading company?
A: We are a factory specializing in the production of external indexable turning tool holders,boring bars, threading holders and grooving holders for CNC lathes and indexable milling cutters for CNC machine center as well as their spare parts.
Q: Can we use our own logo or design?
A: Yes, we provide OEM and ODM
Q: What is your MOQ?
A: We have stock in stock for regular products, and we support a minimum order of one, and a minimum order of 20 non-standard products.
Q: How can I get some samples?
A: We are willing to provide you samples for testing after receiving the sample fee.
Q: Do you accept custom orders?
A: Of course, we are a professional manufacturer, and custom orders are what we are good at.