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Machine Keys / Key Materials

Machine key / Key material machine key is a fitting that is used to fix a pulley or gear to a rotating shaft. It is often used for motors and reducers, and is built into various machines. Because it is a component for power transmission, it is characterized by excellent strength and precision machining with few errors. Machine keys are roughly divided into three types according to parallel keys, gradient keys, headed gradient keys, and their shapes. In addition, there are various variations depending on the square and round shape of the edge processing. Let's choose an appropriate one according to the size of the keyway of the rotating shaft and the parts fixed to the shaft.
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  1. Key Material S45C (New JIS Parallel Double-Sided Square Key Standard Product)
    TRUSCO Key Material S45C (New JIS Parallel Double-Sided Square Key Standard Product)
    You can cut it to the required length and use it. A detent for the joint between the shaft of a motor or reducer and the gear or sprocket.
    Tolerance  JIS B 1301  Length (mm)  300  Shape  Double-sided key 
    Rating:
    97%
    from S$2.39
    Min. 2 days
  2. Single round key (free length) SUS316 / 7
    Seiki Seisakusho Single round key (free length) SUS316 / 7
    The length of the free length series can be freely specified in 1 mm increments. We use high-precision cold drawing material to guarantee accuracy and minimize variations in lots. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Suitable Shaft Diameter (Φmm)  20~25  Width Tolerance (mm)  0/-0.036  Height Tolerance (mm)  0/-0.036  Height h (mm)  Width b (mm)  Tolerance  Width: h9, height: h9  Chamfer c (mm)  0.25~0.40 
    from S$8.99
    Min. 9 days
  3. Machine Key Double Round Key (Dimensional Cut Product)
    Osaka Spirit Machine Key Double Round Key (Dimensional Cut Product)
    Shape  Double circle key  Standard  New JIS standard  Material  S45C 
    Rating:
    98%
    from S$1.59
    Min. 2 days
  4. Machine Key S45C New JIS Parallel Key Double-Sided Standard Product
    Hinode Machine Key S45C New JIS Parallel Key Double-Sided Standard Product
    Standard  New JIS standard  Length L (mm)  300 
    Rating:
    88%
    from S$3.89
    Min. 2 days
  5. Machine Key Single Round Key (Dimension Cut Product)
    Osaka Spirit Machine Key Single Round Key (Dimension Cut Product)
    Standard  New JIS standard  Material  S45C  Shape  Single circle key 
    Rating:
    97%
    from S$1.49
    Min. 2 days
  6. Machine Key S45C Old JIS Parallel Key Double-Sided Standard Product
    Hinode Machine Key S45C Old JIS Parallel Key Double-Sided Standard Product
    Dimension L (mm)  300  Standard  Old JIS type 1  Material  S45C 
    Rating:
    96%
    from S$3.99
    Min. 2 days
  7. Double-sided key
    Seiki Seisakusho Double-sided key
    SEIKI's S50C material is commonly used. It has better strength than S45C material.
    Material  S50C  Tolerance  h9  Shape  Double-sided key 
    Rating:
    73%
    from S$2.49
    Min. 2 days
  8. Polished S45C Woodruff Key
    Hinode Polished S45C Woodruff Key
    The sink key is a key used in general machines to fix pulleys, gears, etc. to a rotating shaft. There are three types of sinking keys: parallel keys (1 type, 2 types), gradient keys, and headed gradient keys. The following materials are generally used for the key material. JIS G 3123 S20C-D or S4... Read More
    Shape  Half moon key  Material  S45C 
    Rating:
    94%
    from S$1.29
    Min. 2 days
  9. Parallel Key Double End Round Type (S45C)
    TRUSCO Parallel Key Double End Round Type (S45C)
    Both round keys are easy to use and ready to use. A detent for the joint between the shaft of a motor or reducer and the gear or sprocket.
    Shape  Double circle key  Type  Double circle type  Tolerance  JIS B 1301 
    Rating:
    100%
    from S$7.99
    Min. 2 days
  10. Machine Key S45C New JIS Parallel Key Double-Sided Standard Product
    Hinode Machine Key S45C New JIS Parallel Key Double-Sided Standard Product
    The sink key is a key used in general machines to fix pulleys, gears, etc. to a rotating shaft. There are three types of sinking keys: parallel keys (1 type, 2 types), gradient keys, and headed gradient keys. The following materials are generally used for the key material. JIS G 3123 S20C-D or S4... Read More
    Shape  Long key  Material  S45C (New JIS key) 
    Rating:
    90%
    from S$29.99
    Min. 2 days
  11. Parallel key single circle S50C
    Seiki Seisakusho Parallel key single circle S50C
    It is a machine key with excellent strength because it uses carbon steel (S50C) cold drawing material for machine structure. Power transmission parts for motors, reduction gears, pumps, etc.
    JIS Standard  JIS B 1301  Shape  Single circle key  Type  Single round type 
    Rating:
    85%
    from S$8.79
    Min. 3 days
  12. Handy Key
    Hinode Handy Key
    Easy and ready to use. Each type (dimension) is neatly packed. Since it is a double-round key, there is no need for R processing.
    Shape  Double circle key  Type  Individual pack  Tolerance  New JIS standard  Material  S45C 
    Rating:
    100%
    from S$14.99
    Min. 2 days
  13. Machine key SUS304 Old JIS parallel double-sided key standard product
    Osaka Spirit Machine key SUS304 Old JIS parallel double-sided key standard product
    Dimension L (mm)  300  Shape  Double-sided key  Standard  Old JIS type 1  Material  SUS304 
    Rating:
    93%
    from S$12.99
    Min. 2 days
  14. Parallel Key Double End Round
    Seiki Seisakusho Parallel Key Double End Round
    Since it uses stainless steel (SUS316) cold drawing material, it has excellent toughness and corrosion resistance. Power transmission parts for motors, reduction gears, pumps, etc.
    Shape  Double circle key  Specification  Double circle type  JIS Standard  JIS B 1301  Material  Stainless steel (SUS316) 
    Rating:
    100%
    from S$13.99
    Min. 3 days
  15. Inch size key Double-sided S45C New JIS compliant
    CHIP QUIK Inch size key Double-sided S45C New JIS compliant
    It is an inch size key that is mainly used for machines of overseas manufacturers. It is an inch-sized key that is rare for domestic sales. Machines made overseas, etc.
    Shape  Both corners  Standard  New JIS compliant  Material  S45C 
    Rating:
    90%
    from S$7.99
    Min. 2 days
  16. Machine Key Double Round Key (Stainless Steel)
    Osaka Spirit Machine Key Double Round Key (Stainless Steel)
    Shape  Double circle key  Standard  New JIS standard  Material  SUS304 
    Rating:
    100%
    from S$4.69
    Min. 2 days
  17. Machine key Double-sided key (Dimensional cut product)
    Osaka Spirit Machine key Double-sided key (Dimensional cut product)
    Shape  Double-sided key  Standard  New JIS standard  Material  S45C 
    Rating:
    73%
    from S$1.49
    Min. 2 days
  18. New JIS headed gradient key
    Nankai New JIS headed gradient key
    Shape  Headed gradient key  Standard  New JIS  Material  S45C 
    Rating:
    100%
    from S$25.99
    Min. 2 days
  19. Machine Key SUS304 New JIS Parallel Key Double-Sided Standard Product
    Osaka Spirit Machine Key SUS304 New JIS Parallel Key Double-Sided Standard Product
    Dimension L (mm)  300  Shape  Double-sided key  Standard  New JIS standard  Material  SUS304 
    from S$21.99
    Min. 2 days
  20. Headed gradient key
    Nankai Headed gradient key
    Tolerance  (b)h9、(h)h10  Shape  Headed gradient key  Standard  Old JIS  Material  S45C 
    from S$27.99
    Min. 2 days
  21. Machine Key S45C Old JIS Parallel Double-Sided Square Standard Key
    Hinode Machine Key S45C Old JIS Parallel Double-Sided Square Standard Key
    The sink key is a key used in general machines to fix pulleys, gears, etc. to a rotating shaft. There are three types of sinking keys: parallel keys (1 type, 2 types), gradient keys, and headed gradient keys. The following materials are generally used for the key material. JIS G 3123 S20C-D or S4... Read More
    Shape  Long key  Material  S45C 
    Rating:
    100%
    from S$32.99
    Min. 2 days
  22. Single circle key
    Seiki Seisakusho Single circle key
    Using high-precision cold drawing material, we not only guarantee accuracy but also improve strength. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Tolerance  Width: h9, height: h11  Shape  Single circle key 
    from S$2.49
    Min. 2 days
  23. Double circle key
    Seiki Seisakusho Double circle key
    Using high-precision cold drawing material, we not only guarantee accuracy but also improve strength.
    Material  S50C  Shape  Double circle key  Tolerance  h9 
    from S$2.49
    Min. 5 days
  24. Double-sided key (stainless steel)
    Seiki Seisakusho Double-sided key (stainless steel)
    SEIKI's SUS316 material has excellent corrosion resistance and strength. The strength is equivalent to S50C or higher.
    Tolerance  h9  Material  SUS316  Shape  Double-sided key 
    Rating:
    60%
    from S$4.89
    Min. 5 days
  25. Gradient key with head (New JIS (S45C / Fabric)
    Osaka Spirit Gradient key with head (New JIS (S45C / Fabric)
    Surface Treatment  Fabric (or standard)  Material  S45C 
    from S$6.89
    Min. 2 days
  26. Machine key Single round key (Stainless steel)
    Osaka Spirit Machine key Single round key (Stainless steel)
    Standard  New JIS standard  Material  SUS304  Shape  Single circle key 
    Rating:
    100%
    from S$3.99
    Min. 2 days
  27. Polishing Supple New JIS Headed Suppil
    Hinode Polishing Supple New JIS Headed Suppil
    The sink key is a key used in general machines to fix pulleys, gears, etc. to a rotating shaft. There are three types of sinking keys: parallel keys (1 type, 2 types), gradient keys, and headed gradient keys. The following materials are generally used for the key material. JIS G 3123 S20C-D or S4... Read More
    Shape  Headed key  Material  S45C (New JIS key) 
    from S$48.99
    Min. 2 days
  28. Parallel key both sides FC
    Seiki Seisakusho Parallel key both sides FC
    It is a machine key with excellent strength because it uses carbon steel (S50C) cold drawing material for machine structure. Power transmission parts for motors, reduction gears, pumps, etc.
    Shape  Double-sided key  JIS Standard  JIS B 1301 
    from S$1.49
    Min. 4 days
  29. Gradient key with head (old JIS (S45C / fabric))
    Osaka Spirit Gradient key with head (old JIS (S45C / fabric))
    Surface Treatment  Fabric (or standard)  Material  S45C 
    from S$6.29
    Min. 4 days
  30. Double End Square Key (Stainless Steel)
    Nankai Double End Square Key (Stainless Steel)
    Dimension L (mm)  300  Shape  Double-sided key  Material  SUS304 
    from S$10.99
    Min. 3 days
  31. Yaki key (Yakki, new JIS both corners)
    Nankai Yaki key (Yakki, new JIS both corners)
    Heat treatment hardness (HRC22 ~ 30) Hardness that does not hinder additional machining. Tolerance is a new JIS standard, 4-sided polished product. The material is S45C, which is rust-proofed for easy storage.
    Dimension L (mm)  300  Shape  Double-sided key  Standard  New JIS  Material  S45C 
    from S$9.89
    Min. 2 days
  32. Machine key SUS304 Old JIS parallel double-sided key standard product
    Himeno Precision Works Machine key SUS304 Old JIS parallel double-sided key standard product
    Dimension L (mm)  300  Shape  Double-sided key  Standard  Old JIS type 1  Pharmaceuticals and Medical Devices Act  Quasi-drugs  Material  SUS304 
    from S$15.99
    Min. 4 days
  33. Polished Supil S45C Headed Supil
    Hinode Polished Supil S45C Headed Supil
    The sink key is a key used in general machines to fix pulleys, gears, etc. to a rotating shaft. There are three types of sinking keys: parallel keys (1 type, 2 types), gradient keys, and headed gradient keys. The following materials are generally used for the key material. JIS G 3123 S20C-D or S4... Read More
    Shape  Headed key  Material  S45C 
    from S$48.99
    Min. 4 days
  34. Double round key (free length) S45C / 20
    Seiki Seisakusho Double round key (free length) S45C / 20
    The length of the free length series can be freely specified in 1 mm increments. We use high-precision cold drawing material to guarantee accuracy and minimize variations in lots. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Shape  Double circle key  Chamfer c (mm)  0.60~0.80  Height h (mm)  12  Width b (mm)  20  Width Tolerance (mm)  0/-0.052  Height Tolerance (mm)  0/-0.11  Tolerance  Width: h9, height: h11  Suitable Shaft Diameter (Φmm)  65~75 
    from S$29.99
    Min. 9 days
  35. Single round key (free length) S45C / 22
    Seiki Seisakusho Single round key (free length) S45C / 22
    The length of the free length series can be freely specified in 1 mm increments. We use high-precision cold drawing material to guarantee accuracy and minimize variations in lots. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Chamfer c (mm)  0.60~0.80  Width Tolerance (mm)  0/-0.052  Width b (mm)  22  Height Tolerance (mm)  0/-0.11  Height h (mm)  14  Shape  Single circle key  Suitable Shaft Diameter (Φmm)  75~85  Tolerance  Width: h9, height: h11 
    from S$29.99
    Min. 9 days
  36. Double-sided key
    Nankai Double-sided key
    Tolerance  (b)p7、(h)h9  Dimension L (mm)  300  Shape  Double-sided key  Standard  JIS Class 1  Material  S45C 
    from S$27.99
    Min. 3 days
  37. Double-round key (with tap removed)
    Seiki Seisakusho Double-round key (with tap removed)
    The key will come out naturally when the bolt is screwed into the pull-out tap. The removed key will not be scratched and can be used again. Using high-precision cold drawing material, we not only guarantee accuracy but also improve strength.
    Shape  Double circle key  Tolerance  h9 
    from S$3.89
    Min. 5 days
  38. Single round key (free length) S45C / 20
    Seiki Seisakusho Single round key (free length) S45C / 20
    The length of the free length series can be freely specified in 1 mm increments. We use high-precision cold drawing material to guarantee accuracy and minimize variations in lots. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Width Tolerance (mm)  0/-0.052  Height Tolerance (mm)  0/-0.11  Height h (mm)  12  Chamfer c (mm)  0.60~0.80  Shape  Single circle key  Suitable Shaft Diameter (Φmm)  65~75  Width b (mm)  20  Tolerance  Width: h9, height: h11 
    from S$29.99
    Min. 5 days
  39. packey (Pakky New JIS Ryomaru)
    Nankai packey (Pakky New JIS Ryomaru)
    It does not need to be processed and can be used immediately. It is standardized and packed for each dimension. Since the length dimension is finished with a minus eye, it can be easily inserted into the keyway. It is rust-proof and can be stored.
    Shape  Double circle key  Standard  New JIS  Material  S45C 
    from S$8.99
    Min. 5 days
  40. Double round key (free length) S45C / 28
    Seiki Seisakusho Double round key (free length) S45C / 28
    The length of the free length series can be freely specified in 1 mm increments. We use high-precision cold drawing material to guarantee accuracy and minimize variations in lots. SUS316 is used for the stainless steel material to improve corrosion resistance.
    Shape  Double circle key  Width b (mm)  28  Suitable Shaft Diameter (Φmm)  95~110  Width Tolerance (mm)  0/-0.052  Chamfer c (mm)  0.60~0.80  Height Tolerance (mm)  0/-0.11  Tolerance  Width: h9, height: h11  Height h (mm)  16 
    from S$39.99
    Min. 9 days
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