SD20.5-25.5-C25shallow Hole Drill, Fast Drill, Violent Drill

• Customization: Available
• Customized: Non-Customized
• Standard: DIN
• Model NO.: SD20.5-25.5-C25
• Type: Core Drill Bit
• Material: High Carbon Steel
• Usage: Metal Drilling
• Name: SD20.5-25.5-C25
• Length:Diameter: 2D, 3D, 4D, 5D
• Color: Metal Coating
• Stock?: Yes
• Specification: 14
• Origin: Dezhou
• HS Code: 8207509000
• Production Capacity: 2000

Product Description

                                                              U drill 

1.What is U drill?


Indexable drill or blade drill bit is called u drill . Later, people called it u drill. U-drill, also known as shallow hole drill, fast drill, violent drill, etc. U-drill is actually an internally cooled drill bit that can be continuously drilled with good cutting arrangement, making the efficiency of U-drill drilling very high.
 

Product Description

 

2.Characteristics and advantages of U drill

1. First of all,the difference between U drill and ordinary drill is that U drill uses hard alloy blades and designs inner and outer edge blades.After the drill is worn,the blades can be replaced directly without regrinding.
2. U drill has better rigidity and can use a high feed rate. Moreover,the processing diameter of U drill is much larger than that of ordinary drill.The drilling range can reach D10mm~80mm,and the longest processing depth can reach 5 times diameter.
3. The precision of the u-drill is higher than that of the conventional drill,and the finish is better, and the U-drill can correct the precision of the hole position.
4. U drill can drill holes on surfaces with inclination angles less than 30~without reducing cutting parameters.
5. When the cutting parameters of U drill are reduced by 30%,discontinuous cutting can be realized, such as processing intersecting hole,intersecting hole and phase perforation.
6. U drill can realize drilling of multi-step holes,and can boring,chamfer and eccentric drilling.
7. The drilling cuttings of U drill are mostly short cuttings,and the internal cooling system can be used for rapid chip removal without iron cuttings,which is conducive to product processing continuity, shorten processing time and improve efficiency.
8. There is no need to Pre-drill the center hole with U drill,and the bottom surface of the processed

U drill type  SD AND SP type


4.Model code rules
 For example SD18-3D-C25
SD18, 18 is bar diameter, 3d is length:diameter    C25 is shake diameter

5.U drill insert type

model	Size					Parts
	I	d			d1	Screw	Wrench
WCMX030208	3.8	5.56	2.38	0.4	2.5	M2.5*6	T8
WCMX040208	4.3	6.35	2.38	0.4	2.8	M2.5*6	T8
WCMT050308	5.4	7.94	3.18	0.8	3.4	M3*8	T8
WCMT06T308	6.5	9.525	3.97	0.8	4.4	M3.5*10	T15
WCMT080412	8.7	12.7	4.76	0.8	5.5	M4*10	T15

 

.No	Size				Parts
	d			d1	Screw	Wrench
SPMG050204	5.00	2.38	0.4	2.25	M2.2*5	T6
SPMG060204	6.00	2.38	0.4	2.61	M2 2*6	T7
SPMG07T308	7.94	3.97	0.8	2.85	M2.5*8	T8
SPMG090408	9.80	4.30	0.8	4.05	M3.5*10	T15
SPMG110408	11.50	4.80	0.8	4.45	M4*10	T15
SPMG140512	14.30	5.20	1.2	5.75	M5*12	T20

6.Bit features
1.Chip removal tank




Innovative spiral groove design,inside and outside groove ratio 6:4, better chip removal.


2.The blade postion




Flat blade position, better fit with the blade, effectively improve the cutting effect


3.Tool rod rigid


The edge chanfer is smaller,improve the rigidity of the cutter bar,and
embrace chip discharge effectively protects the cutter body from wear.


4.Oil cooling system

 Increase oil cold water hole 1.5 times, better cooling,faster chip removal.


5.Cold connection forlathe oil


Handle tail with tube screw,easy to use lathe oil cold.