|
|
|
|
|
|
|
Á¦¸ñ |
|
¡ß 9 ¡ß üÀÎ »ç¿ë½Ã ÁÖÀÇ »çÇ× |
2007-08-27 22:32:38 |
|
ÀÛ¼ºÀÎ |
|
|
|
|
üÀÎ »ç¿ë¹ý |
Caution |
|
¢À Do not bend chain horizontally. For spin suspension, the following table is the standard. ¢À Strength Efficiency of suspended Load¡¯s Angle
Suspension Angle |
Above 90o |
45o |
30o |
Strength Efficiency(%) |
60 |
50 |
45 | |
¢À Prevention of heat effects on the chain. When the temperature is 400¡Æ to 500¡Æ the impact value by blue brittleness reduces. ¢À Efficiency of Used Load Under High-temperature Work. |
|
-40o to 100o |
100o to 200o |
200o to 300o |
300o to 350o |
350o to 400o |
400o to 450o |
more than 450o |
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 ©¬ 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¡Æ |
45¡Æ |
65¡Æ |
90¡Æ |
Strength Efficiency (%) |
96 |
92 |
86 |
70 | |
¢À If more than single sling, put weight of load equally. Do not twist the chain. ¢À 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). ¢À When cutting the chain, use a high-speed cutter in order to prevent heat effects (gas cutting is not advised). ¢À 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 ¢À 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 ¢À 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. ¢À Breaking load values in our catalogue are those tested with unpainted products. ¢À Data : SKS | |
|
|
|
|
|
|
|
| |