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Super Spade Drills

We have given SAMAR for holes that are accurate, fine finished and without ovality. These tools are serving you for last 3 to 4 decades. Now we have come-up with Spade Drill to replace costly Twist Drills. These, we found, are successful in long and deep drilling upto 20 times its size(i.e. dia.75 – 1250mm deep with thro’ coolant). Recently we have successfully demonstrated Dia. 73 x 1250mm length in BHEL. It was a Skoda horizontal boring machine. RPM 18 and feed 0.5mm.The time saved was more the 1/3 or the earlier tools. We, therefore, want you to know that any problem of deep drilling can be tackle with our Super Spade Drill.
  Spade Drills are a known device which surpasses twist drills in many ways.
 

Operational :

 
  1. More inherent Rigidity.
  2. Heavier feed rates compensates for the 10% to 15% reduction in RPM.
  3. More chip clearance adds to production efficiency.
  4. Quality of holes made by Spade Drills is Superior to the twist Drills. Hence Reaming/burnishing can follow immediately.
  5. Fractional sizes i.e. 25.1, 30.9 etc can be made available by making such blades.
   
  Economical :
 
  1. Two piece construction facilitate a number of blades on one shank.
  2. Blades are replaceable and can be reground.
  3. Same blades can be used on short, long and extra long shanks.
  4. Depth to diameter ration in Spade Drilling has been achieved upto 20:1 through Coolant arrangement is a must.
  5. With special Blades, core drilling, counter Boring and Bottoming to flat or contoured shape can be achieved.
  6. The shanks can be offered in straight to tapered, long to extra long and with ISO-40.
  7. We can give Spade Drills from 18.00mm to 140.00mm in 14 sizes.
   
  Instructions For Using Spade – Drills
  Generally the speeds used for H.S.S. Spade Drills are in the low to medium ranges. Whenever , the Feed is high, depending upon the hardness of the material , the speed can be varied to avoid vibrations. If the blade experiences burning on periphery, then reduce speed. While using Carbide Spade Drills, it is advisable to predrill the work piece with a dia.10mm twist drill & then to use the Spade Drill. The carbide Spade Drills are to be used with high speeds & low Feeds as given in the Chart. However, if any vibrations are occurring, then the Feed has to be reduce in increments.
   
 

SPEED : V  M/MIN

FEED : MM/REV.

Dia. 24-38               39 - 76          77-127            128-140
FEED 0.3-0.35             0.2 – 0.25 0.15 – 0.2        0.1 – 0.15
Material C.I.  130 – 140       100 – 120 80 – 100          60 - 80
Steel
a)   M.S.
100 – 120        80 – 100 60 – 80            45 - 60
b)  Forging  80 – 100          30 – 70 45 – 60            25 – 40
c)Tool Steels       80 – 100          50 – 70 45 – 60            25 – 40
d) Medium Carbon Steel 80 – 100          60 – 80 45 – 60            20 – 40
e) High Carbon Steel 60 – 80            50 – 70 30 – 50            20 - 30
   
 
 
 
Products Range
Adjustable Reamers   |    Burnishing One Blade   |    Super Spade Drills    |   Bobar Blades
 
Contact Us
  SUPER SURFACE TOOLS CO.
Address :- C-5/A, Ghatkopar Industrial Estate, Ghatkopar (W), Mumbai - 400086, Maharashtra, INDIA.
Telephone :- 022 25007027
Mobile :- 9820882638
E-mail :-
Visit us also :- www.drillsreamersbobars.co.in
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