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  • Shank Adaptors
Coupling Sleeves
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General Introduction:

Acedrills’ coupling sleeves are available with both half-bridge and full-bridge types, as well as adapter couplings.

Semi-bridge coupling, by far is the most popular, has a small non-threaded bridge in the centre. The drill rod cannot thread past the centre of the couplings, and the smaller diameter rods portions butt together in the centre bridge area of the coupling. Semi-bridge couplings are most suited to high torque machines. Most rope (R) and Trapezoidal (T) threaded couplings are semi-bridged.

Full bridge coupling has a great advantage that it positively eliminates the potential for the coupling to creep along the threaded joints. These couplings, are typically used in a Trapezoidal thread, in surface drilling application, have better uncoupling characteristics and tend to maintain tighter joints. Full-bridge couplings have less chance of jamming and are best suited to machines equipped with independent rotation.

Adapter couplings are used when changing from one thread type, or size, to another and are typically required only in special circumstances.

 

Specification Overview:

Semi-bridge & Full-bridge Couplings

Adapter Couplings

Thread

Length

Diameter

Thread

Length

Diameter

mm

inch

mm

inch

mm

inch

mm

inch

R22

140

5 1/2

32

1 1/4

R25-R32

150

5 7/8

45

1 3/4

R25

150

5 7/8

35

1 3/8

160

6 1/4

45

1 3/4

160

6 5/16

38

1 1/2

R25-R38

160

6 5/16

56

1 13/64

R28

150

5 7/8

40

1 37/64

R25-T38

170

6 3/4

56

1 13/64

160

6 5/16

42

1 21/32

180

7 1/16

56

2 1/8

R32

155

6 1/8

44

1 3/4

210

8 1/4

56

2 1/8

150

5 7/8

44

1 3/4

R28-R32

160

6 5/16

45

1 3/4

150

6 1/8

45

1 3/4

R28-R38

160

6 5/16

56

1 13/64

160

6 1/4

45

1 3/4

R32-R38

160

6 1/4

55

2 5/32

R38

170

6 3/4

55

2 5/32

170

6 3/4

55

2 5/32

180

7 1/16

55

2 5/32

180

7 1/16

55

2 5/32

190

7 1/2

55

2 5/32

210

8 1/4

55

2 5/32

T38

180

7 1/16

55

2 5/32

R32-T38

170

6 3/4

56

1 13/64

190

7 1/2

55

2 5/32

180

7 1/16

55

2 5/32

T45

207

8 5/32

66

2 37/64

R32-T45

190

7 1/2

63

2 33/64

210

8 1/4

63

2 33/64

R38-T38

180

7 1/16

56

1 13/64

210

8 1/4

66

2 37/64

T38-T45

190

7 1/2

63

2 33/64

T51

225

8 7/8

71

2 51/64

210

8 1/4

63

2 33/64

235

9 1/4

72

2 7/8

T45-T51

235

9 1/4

72

2 7/8

235

9 1/4

76

3

 

Note:  Special specification may be available upon request.

 

For brochure and more product information, please click here to verify your company information and tell us the detail.

 

How to order?

Style + Thread + Length +Diameter