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MORSE TAPER DRILL SLEEVES

mtsleeve003.jpg    mtsleeve001.jpg
Morse Taper drill sleeves are used as reduction or sizing up of Morse taper tooling. Most common Morse taper tooling is taper shank drills, also Morse taper reamers and other HSS cutting tools.

The Morse taper drill sleeves are hardened steel, internally and externally ground. Size adaptors from one size stepping up to the next or skipping to a couple larger sizes (ie; 2- MT sleeve); this allows a No.2 Morse taper drill to be sleeved to suit a No.3 Morse taper machine spindle. Quite often several drill sleeves are joined together to gain the required Morse taper.

The Morse taper was developed by Stephen Morse, as a friction taper to drive and lock in different cutting tools into machines and Morse taper machine spindles. The Morse taper has become an ISO & DIN standard taper in the engineering world today. The tang at the end of the taper is used for ejecting out of the Morse taper drill sleeve or spindle.

Morse tapers range from No.0 Morse taper up to No.7 Morse taper.  No.3 is the most popular; drills aprox. 23mm thru to 32mm. Most bench drill presses are either No.2 or No.3 Morse taper spindles.

Morse taper sleeves are also available as an extension arbor whereby you can extend the length of a cutting tool using a 3MT - 3MT extension sleeve (aprox. 200mm in length).

mtsleeve005.jpgThe opposite drill sleeve can also achieve larger Morse taper drill into a smaller spindle, however is a longer length; ie. 2MT - 5MT extension sleeve (2MT outside up to 5MT inside - aprox. 300mm in length).

The Morse taper drills are ejected from Morse taper drill sleeves by the use of tapered wedges known as drill drifts.  Miller's Tooling Pty Ltd offer drill drifts as individual pieces or as economically priced sets.

Milling tapers like ISO 40 spindles also have Morse taper adaptors readily available, so the machinist can run a 3MT drill in an ISO40 machine spindle for example, using an ISO40-3MT adaptor.

 

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Morse Taper

Taper

A

B(max)

C(max)

D(max)

E(max)

F

G

H

J

K

0

19.212:1

9.045

56.5

59.5

10.5

6

4

1

3

3.9

1°29'27"

1

20.047:1

12.065

62

65.5

13.5

8.7

5

1.2

3.5

5.2

1°25'43"

2

20.020:1

17.780

75

80

16

13.5

6

1.6

5

6.3

1°25'50"

3

19.922:1

23.825

94

99

20

18.5

7

2

5

7.9

1°26'16"

4

19.254:1

31.267

117.5

124

24

24.5

8

2.5

6.5

11.9

1°29'15"

5

19.002:1

44.399

149.5

156

29

35.7

10

3

6.5

15.9

1°30'26"

6

19.180:1

63.348

210

218

40

51

13

4

8

19

1°29'36"

7

19.231:1

83.058

285.75

294.1

34.9

-

-

19.05

-

19

1°29'22"