오성산업

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1. 일반체인

2. 합금강체인

3-1. 스텐로프 휀스

3. 와이어로프

4. 섬유로프

5. 호이스트

6. 윈치

7. 타이어체인

8. 후크부속류

9. 로프부속류

10. 슬링

11. 샤클.턴버클

12. 크램프

13. 리프트

14. 제품 전체보기

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오성산업 > 자료실 > 상세보기 [공개게시판]

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◆ 9 ◆ 체인 사용시 주의 사항

2007-08-27 22:32:38

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Caution

♣ Do not bend chain horizontally.
For spin suspension, the following table is the standard.
♣ Strength Efficiency of suspended Load’s Angle

Suspension Angle	Above 90^o	45^o	30^o
Strength Efficiency(%)	60	50	45

♣ Prevention of heat effects on the chain. When the temperature is 400^° to 500^° the impact value
by blue brittleness reduces.
♣ Efficiency of Used Load Under High-temperature Work.

	-40^o to 100^o	100^o to 200^o	200^o to 300^o	300^o to 350^o	350^o to 400^o	400^o to 450^o	more than 450^o
JIS-V	100	90	75	65	60	Not for use	Not for use
S-T	100	100	100	80	70	60	Not for use

Caution

Make the angle of suspension as small as possible. If angle ß is more than 30⁰, the slide will result. (In this event, use the beam suspension.)
Strength Efficiency of The Suspension Angle a (alpha)

Suspension Angle	30^°	45^°	65^°	90^°
Strength Efficiency (%)	96	92	86	70

♣ If more than single sling, put weight of load equally. Do not twist the chain.
♣ While the suspension work, or while you work around the place where the chain could be earth,
do not conduct a welding job (it will cause arcstrike).
♣ When cutting the chain, use a high-speed cutter in order to prevent heat effects (gas cutting is not advised).
♣ Regular check-ups along the following standard is advised.

Inspection & Abandonment Standard

Inspection Parts	Standard	Repairs & Counter-measures
Arcstrike	Small arcstrike is a mortal wound.	Abandon
Fissure	As Above	If its fissure depth is less than depth d X0.05, use grinder or file to smoothen it.
Scar	Depth Fused Part max. 0.07d. Others max. 0.1d	Same as fissure
Discoloration	Gray & deep blue are disapproved	As a result of heat, dis-coloration occurs.

Inspection Parts	Standard	Repairs & Counter-measures
Bend	x = max.0.1d	When the bend or twist occurs, it is believed to be caused by concentrated load. Choose a suitable chain.
Twist	x = max.0.1d

Inspection Parts	Standard	Repairs & Counter-measures
Wear	x = max.0.1d	If it reaches the standard situation in a short period of time, it is caused by dust or overload.
Elongation	y = max.1.05P	If pitch of the link is elongated, it is a sign of overload. Replace the chain.

Fall Of Breaking Load By Planting Or Painting

Plating
♣ As a result of different plating temperature and tempering temperature or other factors, the plated goods sometimes weaken by about 15%. As strong chain plating is special, please refer to us.

Painting
♣ If testing is carried out while paint or oil is stuck on the chain, strength of chain may fall by a maximum of 8%. Oil must be removed before test-using. (Breaking elongation of chain will be reduced by oil.). Elimination of oils is compulsory as stated in ISO. Test regulations. During practical use, there will be no occurrence of such problems as paint are removed during use.
♣ Breaking load values in our catalogue are those tested with unpainted products.
♣ Data : SKS