• 8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D
  • 8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D
8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D

8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D

Product Details:

Place of Origin: China
Brand Name: BWIN
Model Number: C20-3D16-51SP06

Payment & Shipping Terms:

Minimum Order Quantity: 1pcs/box
Price: Negotiable
Packaging Details: Plastic box
Delivery Time: 7 work days
Payment Terms: T/T, Western Union
Supply Ability: 1-10000pcs 7days
Get Best Price Contact Now

Detail Information

Product Name: SP Adjustable U Drill Model: C32-5D38.5-198SP11 Fast Drill Bits
Material: H13 Steel Workpiece: Cast Iron, Alloy Steel, Carbon Steel, Etc
Feature: Good Shockproof Performance Application: Drilling
Package: 1pcs/Plastic Box Service: OEM & ODM
High Light:

SP Adjustable U Drill Bit


H13 Steel CNC U Drill


10mm U Drill Bit

Product Description

High Quality SPMG/SPMT SP 2D/3D/4D/5D 8mm U Drilling Tool Holder H13 10mm Adjustable U Drill


Description of SP U drill

  • The U-drill is used with a hard alloy blade embedded in the head, and its drilling life is more than ten times that of a regular drill. The blade can be replaced at any time, with a long service life;
  • During drilling, there are mostly fragments of debris, and an internal cooling system can be used to ensure safe chip removal, which is conducive to continuous processing of the product, shortening the processing time and improving efficiency;
  • Under the condition of standard aspect ratio, there is no need to remove chips when using fast drilling to drill large holes;
  • One drill with multiple uses can achieve multi-stage cutting. Quick drilling can tilt large holes on the surface less than 30 ° without reducing cutting parameters; The surface finish of the holes processed with shallow hole drills is good, with a small tolerance range, and can replace some rough boring cutters.


U-drill cutting condition table

U drill cutting condition
workpiece Shank Dia(mm) Feed rate(mm/rev)
2D 3D 4D 5D
45 # steel/S45C
Recommended cutting speed
D13.0-D18.0 0.07-0.12-0.22 0.07-0.11-0.19 0.07-0.10-0.16 0.006-0.09-0.14
D18.5-D29.0 0.07-0.12-0.22 0.07-0.11-0.19 0.07-0.10-0.16 0.006-0.09-0.14
D29.5-D36.0 0.07-0.13-0.24 0.07-0.12-0.20 0.07-0.10-0.16 0.006-0.09-0.14
D37.0-D55.0 0.08-0.15-.027 0.08-0.13-0.22 0.08-0.13-0.20 0.07-0.10-0.16
D36.0-D68.0 0.09-0.16-0.30 0.09-0.15-0.25 0.09-0.14-0.21 0.08-0.11-0.18

Stainless steel/

Recommended cutting speed

D13.0-D18.0 0.05-0.10-0.17 0.05-0.09-0.14 0.05-0.09-0.12 0.04-0.08-0.10
D18.5-D29.0 0.05-0.10-0.17 0.05-0.09-0.14 0.05-0.09-0.12 0.04-0.08-0.10
D29.5-D36.0 0.05-0.11-0.18 0.05-0.01-0.15 0.05-0.09-0.13 0.05-0.08-0.11
D37.0-D55.0 0.06-0.12-0.20 0.06-0.11-0.17 0.06-0.10-0.14 0.05-0.09-0.13
D36.0-D68.0 0.08-0.13-0.22 0.07-0.12-0.19 0.07-0.11-0.16  
Note: For reference only(Lower limit value - recommended value - upper limit value)


Product Feature of carbide drill bits

  • More precise machining accuracy and concentricity after quenching;
  • Reduce machine load and update blade position angle
  • 6:4 ratio of inner and outer grooves for better and more efficient chip removal
  • Smaller edge chamfer improves tool bar rigidity

8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D 0

8mm 10mm SP Adjustable U Drill Bit H13 Steel SPMG/SPMT SP 2D/3D/4D/5D 1

Comparison of cutting parameters between U-drill and ordinary drill bits

workpiece U Drill Ordinary drill Improve efficiency 100%
Feed rate
wire speed
Feed rate
wire speed
45 steel 0.06~0.18 2000~3500 200~275 0.04~0.1 400~1000 10 600
Hardened steel 0.03~0.10 1500~2000 60~150 0.03~0.08 Unable to drill 5 1000
stainless steel 0.05~0.15 1500~3000 80~150 0.02~0.08 200~800 8 750
aluminium alloy 0.1~0.18 3000~4500 300~385 0.1~.015 1000~2000 20 300
titanium alloy 0.08~0.16 1000~2000 40~50 0.04~0.06 200~800 10 500
  • In the initial drilling, it is recommended to use the cutting value in the middle range, and then adjust the cutting parameters (according to the tool wear) to achieve the best cutting effect. The above cutting parameters are for 2D and 3D types, and for 4D types, the drilling parameters should be correspondingly reduced by 15%.
  • When the cooling method is only external cooling, the cutting speed should be reduced by 10%.
  • For the processing of austenitic stainless steel, internal cooling must be used.
  • When starting external drilling on the inclined plane, or when there are pre drilled and intersecting holes in the parts, or when drilling multi-layer plates, the feed rate needs to be reduced to about one-third of the recommended value.



  • When using the lathe, it is easy to crush and burn the U-drill when using it with a deviation from the center
  • When using small-sized U-drills, high speed and high feed are required, because the lower the parameters, the greater the cutting resistance, and the situation of burning the tool is easy to occur



  • Factory---We have our own factory with modern standard indexable blade production lines, CNC turning tool bar production lines, overall carbide end mill production lines, and PVD coating production lines; The product specifications and models are complete, and can be designed and produced according to customers' non-standard customization needs;
  • Sample---Support free samples, sample preparation for 3-5 days, mass production for 8-10 working days;
  • Logistics---Our shipping channels include sea, land, and air transportation;
  • After sales---We have a complete after-sales system, and cooperation is not the end, it is the beginning. If you have any after-sales problems, please feel free to contact us, and we will solve them for you as soon as possible.


Q1: Is the insert not securely fixed?


1. Clean the blade holder

2. Check if the blade holder is damaged and replace the drill bit if necessary


Q2: Short tool life?


1. Increase the feed rate to crush the cutting

2. Increase coolant pressure


Q3: Is the blade not securely fixed?


1. Check the material comparison table and cutting parameters

2. Increase coolant flow rate

3. Better clamping of tools and/or fastening of parts

4. Inspect/repair the spindle

Q4: Rear foot wear?


1. Reduce cutting speed

2. Increase coolant pressure

3. Increase feed rate

4. Choose a more suitable blade material

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