Turnbuckles under DIN 1478 come in different sizes (e.g., M6, M8, M10, M12, etc.), with varying thread lengths and body diameters. The DIN 1478 standard specifies the dimensions and technical requirements for turnbuckles (also known as rigging screws or stretching screws) used in various applications, such as marine rigging, construction, and industrial setups.
The Differene between Rigging Screws and Turnbuckles
H-Lift DIN 1478 Turnbuckle A turnbuckle is a common rigging device that is used to adjust tension and reduce slack in a rope, cable, or similar tensioning assembly. A turnbuckle is a basic piece of rigging equipment that can be used in a diverse set of tension-related applications. Material: Steel. Surface treatment: Zinc plated or hot dip galvanized. Form: made from steel tube. Type: closed type. End fitting: hook & hook, hook & eye, eye & eye, jaw & eye, jaw & jaw Note: Turnbuckles are not rated for lifting.
Item No.
Size
WLL
Main Dimensions (mm)
Weight
Product Code
A
ton
L
B
C
D
φ
L1
kg
TB147806
M6
0.2
110
6
8.5
17.5
6
170
0.14
702003006
TB147808
M8
0.3
110
6
12
18.5
6
180
0.21
702003008
TB147810
M10
0.5
125
8
14
25
8
210
0.4
702003010
TB147812
M12
0.7
125
10
16
27
10
220
0.6
702003012
TB147816
M16
1.2
170
12
18
35
12
285
1.2
702003016
TB147820
M20
1.5
200
16
23
38
12
335
2
702003020
TB147824
M24
5
255
22
29
42
13
405
3.8
702003024
TB147833
M33
7
295
27
38
58
14
465
6.6
702003033
TB147839
M39
10
330
33
44
63
16
555
11.4
702003039
TB147850
M50
17
356
42
55
100
18
680
21.6
702003050
Rigging screws and turnbuckles are both essential components used in rigging systems to adjust tension and secure loads, particularly in marine and construction applications. While they serve similar functions, they have distinct characteristics and designs.
Rigging Screws
Definition: Rigging screws, also known as rigging tensioners, are devices used to adjust the tension in cables, wires, or rods. They typically consist of a closed body with different handed threads on each end, allowing for precise tension adjustments.
Functionality: Rigging screws allow for tension adjustments by rotating the body, which causes the attached fittings to move in or out. This is crucial for maintaining the correct tension in shrouds, stays, and guard wires.
Turnbuckles
Definition: Turnbuckles, sometimes referred to as bottlescrews, are mechanical devices that adjust the tension or length of cables and ropes. They consist of a frame with two threaded ends, each connected to an eye bolt, hook, or other fittings.
Design: Unlike rigging screws, turnbuckles typically have an open body, which allows for easier inspection and maintenance. They are also available in various materials, including stainless steel and bronze, for durability.
Functionality: Similar to rigging screws, turnbuckles adjust tension by rotating the central frame. However, they usually feature one left-hand and one right-hand thread, enabling simultaneous adjustment of both ends of the cable.
Applications: Turnbuckles are widely used in marine rigging, construction, and other applications requiring precise tensioning of cables or rods
Key Differences
Body Design: Rigging screws generally have a closed body, while turnbuckles have an open body.
Thread Types: Rigging screws often have different handed threads on each end, whereas turnbuckles typically have one left-hand and one right-hand thread.
Usage: Turnbuckles are more commonly used in applications where frequent adjustments are needed, while rigging screws are often preferred for more permanent installations where adjustments are less frequent.
In summary, both rigging screws and turnbuckles are vital for tensioning and securing loads in various applications, with their specific designs catering to different operational needs.
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