Used in extension rod connection, its function is to transmit impact energy from the rock-drill piston, as well as rotation torque, into the drill string with no losses. It must withstand and transmit up to 6300 blows per minute from the piston continually, with great endurance and dependability.
Key Specifications:
• Size Range: R25, R28, R32, R35, R38, T38, T45, T51, R25-R28, R22-R25, R25-R32, R32-R38, R32-T38.
• Standard Lengths: 140mm - 235mm
• Standard Packaging: Wooden case or carton.
COUPLINGS SPECIFICATIONS
THREAD
LENGTH (L)
DIAMETER (D)
Weight
mm
In
mm
In
Kg
R22
140
5-1-2
30
1-3-16
0.45
R25
150
5-29/32
33
1-5-16
0.5
R25
150
5-29/32
35
1-3-8
0.52
R28
150
5-29/32
39
1-17/32
0.6
R32
150
5-29/32
42
1-21/32
0.9
R32
150
5-29/32
44
1-23/32
0.95
R38
170
6-11-16
55
2-5/32
1.75
T38
190
7-1-2
52
2-3/64
1.6
T38
190
7-1-2
55
2-5/32
1.95
T45
210
8-1-4
63
2-15/32
2.75
T45 HD
210
8-1-4
66
2-19/32
3.2
T51
225
8-7-8
72
2-13/16
3.85
T51 HD
225
8-7-8
76
3
4.68
COUPLINGS - Full Bridge
THREAD
LENGTH (L)
DIAMETER (D)
Weight
mm
In
mm
In
Kg
R25
200
7-7-8
35
1-3-8
0.8
R28
160
6-5-16
39
1-17/32
0.7
R32
200
7-7-8
44
1-23/32
1.5
R32
300
11-13/16
44
1-23/32
2.6
R38
210
8-1-4
55
2-5/32
2.6
T38
205
8-1-16
55
2-5/32
2.31
T45
230
9-1-16
63
2-15/32
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Frequently Asked Questions
Q1: What is the primary function of coupling sleeves?A: Coupling sleeves are used to connect extension rods, transmitting impact energy and rotation torque from the rock-drill piston to the drill string with minimal loss.
Q2: What materials are used for these coupling sleeves?A: They are manufactured using high-quality Carbon Steel (specifically 23crni3mo) through a forging process to ensure maximum endurance.
Q3: What thread sizes do you provide?A: We offer a wide range of sizes including R25, R28, R32, R35, R38, T38, T45, and T51, including crossover sizes like R32-T38.
Q4: How many blows per minute can these components withstand?A: Our coupling sleeves are engineered to withstand and transmit up to 6300 blows per minute from the piston continually.
Q5: What is the typical packaging for international shipping?A: Products are typically packed in sturdy wooden cases or cartons to ensure safe transport. The standard package size is approximately 30x30x30cm.
Q6: What is your monthly production capacity for these tools?A: We have a production capacity of approximately 500,000 pieces per month to meet high-volume demands.
KAT DRILLING
