ROTARY EYE BOLT RE-A User Manual
Thank you for purchasing the ROTARY EYE BOLT (RE-A Type).
Please read this manual carefully before use and handle the ROTARY EYE BOLT (hereafter referred to as
ROTARY).safely according to the instructions. Please keep this manual in a safe place.

Safety Precautions
1.

Do not apply a load higher than the working load limit (WLL).
* Please refer to the Table of Working Load Limits Depending on Lifting Method (page 4).

2.

Do not directly connect hooks or fittings larger than the inner diameter of the eye part.

3.

Avoid sudden uplifting from the ground (shock loading).

4.

Ensure ROTARY is mounted evenly to the surface in close contact with the surface of the load.

5.

Make sure the ROTARY seat fits tightly to the load (without gap).

6.

The ROTARY is not suitable for rotating of objects when under load.

7.

When lifting horizontally or diagonally, align other lifting equipment to the lifting direction of the ROTARY.
Lifting Direction

Lifting Direction

Horizontal Lifting

Prohibitions⚫

Do not disassemble.

⚫

Do not modify or perform additional processing.

Lifting DirectionDiagonal Lifting

Lifting Direction

ROTARY EYE BOLT RE-A User ManualUse
1.

Confirm the lifting method and the load of the lifted object.
For the working load limit (WLL), refer to the comparison table on page 4.

2.

Before mounting the ROTARY, carry out a prior to use inspection as described on page 3.

3.

Mounting Method(1) Check the material and the depth of the insert on the load.
・Insert Hole Material
The hardness of the insert hole should be S15C (Tensile strength 370N/mm2) or SS400 or higher.
When lifting cast iron or non-ferrous metals, the insert strength is low, the working load limit must be
reduced. Please contact us for confirming the adequate working load.

(2) Remove adhesives from the female thread before tightening the ROTARY.
(3) Tighten the ROTARY using tightening tool RET-A (optional product)
or a short type hex wrench.
(4) After tightening, make sure that the ROTARY seat is in close
contact with the surface of the load (no gap).
(5) After tightening, make sure the eye rotates smoothly.
(6) Make sure there no objects interfere with the rotation rangeof the eye part (see figure "Range of Eye Rotation").

4.

Lifting operations should be carried out by qualified personnel only.
Range of Eye Rotation

Please contact us if you have questions regarding handling or use.

Tightening
1.

For tightening, tool RET-A (optional product) or a short type hex wrench can be used.

2.

If torque tightening is required, use torque tightening tool RET-T (optional product).
Insert the tool into the hexagonal hole and apply the specified torque, using a torque wrenchequipped with a spanner-type or box-type adapter.
See the specifications table (page 4) for the specified tightening torque.

3.

Even if tightened with the correct torque, the ROTARY may loosen depending on lifting conditions.
Check that it is properly tightened before use.

4.

Please contact us for detailed instructions on how to use the optional tightening tool RET-A or thetorque tightening tool RET-T.

ROTARY EYE BOLT RE-A User Manual
Inspection
1.

Daily Inspection (Prior to Use)
Be sure to carry out the following checks before mounting the ROTARY and starting the lifting work.
(1) Moveability: Check if the eye part rotates smoothly.
(2) Deformation: There should be no deformation of the eye,no bending of the bolt, and the retaining ring should notEye

be deformed or stand up.
(3) Cracks: There should be no cracks.
2.

Periodic Inspection
Periodically measure wear and elongation as follows.
BushSet the inspection period depending on the frequency

Boltand environment of use.

Retaining
Ring

ROTARY Dimensions and Parts

3.

Inspection Criteria(1) Wear of the eye top H: If it exceeds 5%, discard or replace.
(2) Elongation or deformation of eye width B: If it exceeds 5%, discard or replace.
(3) Elongation or deformation of eye height C: If it exceeds 5%, discard or replace.

4.

Calculation formula for wear, elongation and deformation:
Initial dimension - Measured dimension

×100 ＞ 5

Initial dimension
If the conditions in the above formula are met, disposal or replacement is necessary.
5.

Inspection Notes(1) Since the eye is a forged part and dimensional tolerances can occur, measure the initialdimensions before the first use.
(2) Please refer to the specifications table (page 4) for the standard values of each dimension.
(3) If wear, elongation or deformation exceeds 5%, please discard or replace the product.
(4) Please contact us for information regarding the discard standard values (wear, elongation, ordeformation exceeding 5%).

We offer a (paid) inspection service. Please feel free to contact us.

ROTARY EYE BOLT RE-A User Manual
Specifications
The working load limit (WLL) varies depending on the lifting method.
Please refer to the WLL table.

BoltDPitch
P (mm)

Hex
Holef (mm)

ABCGHKLNO

0.2

M81.2555030

279101138

120.3

M10

1.5

55030

279101138

15

RE-12A

0.6

M12

1.75

656

34

30

10111444

RE-16A

1.2

M16

2864

38

35

1213

1550

RE-20A

2.0

M20

2.5

1076

44

40

15

16

18

RE-24A

2.6

M24

3

1090

52

50

1719

21

Product
CodeWLL(t)RE-8A
RE-10A

Tightening
Torque(Nm)Weight(kg)30

4～80.1830

4～100.18

18

36

4～15

0.25

24

40

8～30

0.4

58

30

44

16～50

0.7

71

36

48

25～80

1.0

Dimensions (mm)Table of Working Load Limits Depending on Lifting Method
Lifting
MethodLifting Angle (°)

090

0900≦α≦6060＜α≦9090＜α≦1200≦α≦6060＜α≦9090＜α≦120Mode Coefficient

1122

1.73

1.41

12.59

2.12

1.5

Product CodeWorking Load Limits (t)

RE-8A

0.2

0.2

0.4

0.4

0.34

0.28

0.2

0.51

0.42

0.3

RE-10A

0.3

0.3

0.6

0.6

0.51

0.42

0.3

0.77

0.63

0.45

RE-12A

0.6

0.6

1.2

1.2

1.0

0.8

0.6

1.5

1.2

0.9

RE-16A

1.2

1.2

2.4

2.4

2.0

1.6

1.2

3.1

2.5

1.8

RE-20A

2.02.0

4.0

4.0

3.4

2.8

2.0

5.1

4.2

3.0

RE-24A

2.6

2.6

5.2

5.2

4.4

3.6

2.6

6.7

5.5

3.9

* Manual issued September 2024. Product specifications are subject to change without notice to improve reliability,
function or design.

www.martec.co.jp

MARTEC K.K.
Minatojima-Nakamachi 5-1-1, Chuo-ku, Kobe 650-0046, JAPAN
Tel: +81-(0)78-302-0460 / Fax: +81-(0)78-302-1404

info@martec.co.jp