日本SMC气缸的气缸盖用螺栓紧固于机体顶部，成为柴油机的顶端部件，故俗称气缸头。其功用如下：
l．封闭气缸套顶部，与活塞、缸套共同组成密闭的气缸工作空间。
2．将气缸套压紧于机体正确位置上，使活塞运动正常。
3．安装柴油机各种附件，如喷油器、进、排阀装置、气缸起动阀、示功阀、安全阀以及气阀摇臂装置等等。
4．布置进、排气道，冷却水道等。在小型高速机的气缸盖中还布置涡流室或预燃室等。因此气缸盖中孔腔、通道繁多，使其结构形状比较复杂。
SMC紧凑型气缸正常的工作条件：介质、环境温度一般为-20～80℃，工作压力一般为0.1～1.0MPa。具体条件见各类气缸技术参数表。安装前，应在1.5倍工作压力下进行试验，不应漏气。安装的气源进口处需设置油雾器，以利工作中润滑。气缸的合理润滑极为重要，往往因润滑不好而产生爬行，甚至不能正常工作。安装时，要注意动作方向，活塞杆不允许承受偏心负载或横向负载。负载在行程中有变化时，应使用有足够输出力的气缸，并要附加缓冲装置。不使用满行程，特别活塞杆伸出时，不要使活塞与缸盖相碰击。否则容易引起活塞和缸盖等零件损坏。
SMC紧凑型气缸CUK16-15T气体在压缩机气缸中接受活塞压缩而提高压力。涡轮机、旋转活塞式发动机等的壳体通常也称“气缸”。气缸的应用领域包括印刷（张力控制）、半导体（点焊机、芯片研磨）、自动化控制、机器人等等。
日本SMC紧凑型气缸：
CUK16-10D
CUK16-10D-XC34
CUK16-10S
CUK16-10T
CUK16-15D
CUK16-15S
CUK16-15S-X1391
CUK16-15S-XC34
CUK16-15T
CUK16-20D
CUK16-20D-XC34
CUK16-25D
CUK16-30D
CUK16-30D-XC34
CUK16-35D-XC19
CUK16-40D
CUK16-50D
CUK16-5D
CUK16-5D-XC34
CUK16-5S
CUK16-5T
CUK16-60D-X1391
CUK16S-T0820-20
CUK6-10D
CUK6-10D-XC34
CUK6-10S
CUK6-10T
CUK6-150
CUK6-15D
CUK6-15D-XC34
CUK6-15S
CUK6-15T
CUK6-20D
CUK6-25D
CUK6-25D-XB6
CUK6-25D-XC34
CUK6-30D
CUK6-30DCI8870I
CUK6-30D-XC34
CUK6-30S
CUK6-40D
CUK6-50D
CUK6-5D
CUK6-5S
CUK6-5S-XC34
CUK6-5T
CUX10-10D
CUX10-15D
CUX10-30D
CUX10-5D
CUX16-10D
CUX16-15D
CUX16-5D
CUX20-20D
CUX20-30D
CUX20-40
CUX20-40D
CUX25-10D
CUK6D-PS
CUKW10-10D
CUKW10-15D
CUKW10-20D
CUKW10-25D
CUKW10-25DX1391
CUKW10-30D
CUKW10-5D
CUKW16-15D
CUKW16-20D
CUKW20-15D
CUKW20-30D
CUKW20-40D
CUKW20-50D
CUKW25-15D
CUKW25-25D
CUKW32-20D
CUKW32-25D
CUKW32-30D
CUKW32-50D
CUKW6-20D
CUKW6-30D
CUKW6-5D
CU-S016A
CUW10-10D
CUW10-15D
CUW10-20D
CUW10-30D
CUW10-5D
CUW10D-PS
CUW10-E4515-5
CUW16-10D
CUW16-15D
CUW16-25D
CUW16-5D
CUW20-10D
CUW20-20D
CUW20-5D
CUW20D-PS
CUW25D-PS
CUW6-10D
CUW6-5D
CUK20-01-70304
CUK20-10D
CUK20-10S
CUK20-10T
CUK20-15D
CUK20-15D-XC34
CUK20-15S
CUK20-20D
CUK20-25D
CUK20-30D
CUK20-40D
CUK20-50D
CUK20-5D
CUK20-5S
CUK20-80D
CUK25-100D
CUK25-10D
CUK25-10S
CUK25-15D
CUK25-15D-XC34
CUK25-15S
CUK25-20D
CUK25-20D-X34
CUK25-20D-XC34
CUK25-25D
CUK25-30D
CUK25-40D
CUK25-50D
CUK25-5D
CUK25-5S
CUK25-5T
CUK25-60D
CUK32-10D
CUK32-15D
CUK32-20D
CUK32-25D
CUK32-30D
CUK32-40D
CUK32-50D
CUK32-5D
CUK32-5S
CU10-10D
CU10-10DCH1086H
CU10-10DCI3843I
CU10-10DCI4410I
CU10-10D-XB6
CU10-10D-XC22
CU10-10S
CU10-10T
CU10-15D
CU10-15D-XB6
CU10-15S
CU10-15T
CU10-20D
CU10-25D
CU10-30D
CU10-30DCH1086H
CU10-30D-XB6
CU10-40D
CU10-45D-XC19
CU10-50D
CU10-50D-XB9
CU10-55D-XC19
CU10-5D
CU10-5D-XB6
CU10-5S
CU10-5T
CU10-60D
CU10D-E6060-10
CU10D-E6103-10
CU10D-E6330-10
CU10D-E7388-10
CU10D-PS
CU10D-XB6-PS
CU10D-XC22-PS
CU10S-E6287-10
CU10S-PS
CU15D-E7297-16
CU16-01-59917
CU16-10D
CU16-10D-XB6
CU16-10S
CU16-10T
CU16-15D
CU16-15S
CU16-15T
CU16-20D
CU16-25D
CU16-30D
CU16-40D
CU16-40DCL9808L
CU16-40DCM1387M
CU16-50D
CU16-55D-XC19
CU16-5D
CU16-5-DCI72291
CU16-5-DCI7229I
CU16-5S
CU16-5T
CU16-60D
CU16D-E6068-7
CU16D-E7854-15
CU16D-E9481-15
CU16D-E9968-15
CU16D-G3389-15
CU16D-PS
CU16D-XC22-PS
CU16-E0395-20
CU16-E2037-5
CU16-E3775-5
CU16-PS
CU20-100A
CU20-10D
CU20-10S
CU20-15D
CU20-15D-XB6
CU20-15S
CU20-15T
CU20-16D
CU20-20A
CU20-20D
CU20-20D-XB6
CU20-25D
CU20-30D
CU20-30D-XB6
CU20-40D
CU20-50D
CU20-50D-XB6
CU20-5D
CU20-5D-XB6
CU20-70D
CU20-70D-XB6
CU20D-PS
CU20-PS
CU20S-PS
CU25-10D
CU25-10S
CU25-15D
CU25-15S
CU25-20D
CU25-20D-XB6
CU25-25D
CU25-30D
CU25-40D
CU25-50D
CU25-5D
CU25D-PS
CU25D-T2174-30
CU25-E4728-20
CU25-PS
CU32-100D
CU32-10D
CU32-10S
CU32-15D
CU32-15S
CU32-15T
CU32-20A
CU32-20D
CU32-25D
CU32-30D
CU32-30T
CU32-40D
CU32-50A
CU32-50D
CU32-5D
CU32-70D
CU32-80D
CU32-90D
CU32D-PS
CU6-10D
CU6-10S
CU6-10T
CU6-10-U1N00001
CU6-10-U1N0001
CU6-15D
CU6-15S
CU6-15T
CU6-20D
CU6-25D
CU6-30D
CU6-35D-XC19
CU6-50D
CU6-5D
CU6-5D-XB6
CU6-5S
CU6-5T
CU6D-E6981-35
CUJB10-10D
CUJB10-10DM
CUJB10-10S
CUJB10-10SM
CUJB10-15D
CUJB10-15DM
CUJB10-20D
CUJB10-20DM
CUJB10-25D
CUJB10-25DM
CUJB10-30D
CUJB10-30DM
CUJB10-4D
CUJB10-4DM
CUJB10-4S
CUJB10-6D
CUJB10-6DM
CUJB10-6S
CUJB10-8D
CUJB10-8DM
CUJB10-8S
CUJB10-8SM
CUJB10-PS
CUJB10S-W2571-5
CUJB12-10D
CUJB12-10DM
CUJB12-15D
CUJB12-15DM
CUJB12-20D
CUJB12-20DM
CUJB12-25D
CUJB12-30D
CUJB12-30DM
CUJB12-5D
CUJB12-5DM
CUJB12-5S
CUJB12-S-PS
CUJB16-10D
CUJB16-10S
CUJB16-15D
CUJB16-15DM
CUJB16-25D
CUJB16-25DM
CUJB16-30D
CUJB16-5D
CUJB16-5DM
CUJB16-PS
CUJB20-10D
CUJB20-10S
CUJB20-20D
CUJB20-45D
CUJB20-50D
CUJB20-5D
CUJB20-5S
CUJB4-10D
CUJB4-10DM
CUJB4-15D
CUJB4-15DM
CUJB4-20DM
CUJB4-4D
CUJB4-4DM
CUJB4-4S
CUJB4-4SM
CUJB4-6D
CUJB4-6DM
CUJB4-6S
CUJB4-6SM
CUJB4-8D
CUJB4-8DM
CUJB6-10D
CUJB6-10DM
CUJB6-15D
CUJB6-15DM
CUJB6-20D
CUJB6-20DM
CUJB6-25DM
CUJB6-30DM
CUJB6-4D
CUJB6-4DM
CUJB6-4S
CUJB6-4SM
CUJB6-6D
CUJB6-6DCH2257H
CUJB6-6DM
CUJB6-6S
CUJB6-6SB
CUJB6-6SM
CUJB6-8D
CUJB6-8DM
CUJB6-8S
CUJB6-8SM
CUJB6-PS
CUJB8-10D
CUJB8-10DM
CUJB8-10S
CUJB8-10SM
CUJB8-15D
CUJB8-15DM
CUJB8-20D
CUJB8-20DM
CUJB8-25D
CUJB8-30D
CUJB8-30DM
CUJB8-4D
CUJB8-4DM
CUJB8-4S
CUJB8-4SM
CUJB8-6D
CUJB8-6DM
CUJB8-6S
CUJB8-6SM
CUJB8-8D
CUJB8-8DM
CUJB8-8S
CUJB8-8SM
CUJB8-PS
CUJB8RD-W019410
CUJ-M3X33L
CUJS12-10DM
CUJS12-5D
CUJS16-10S
CUJS16-10SM
CUJS16-25D
CUJS16-5D
CUJS20-5D
CUK10-10D
CUK10-10D-XC34
CUK10-10S
CUK10-10T
CUK10-15D
CUK10-15D-XC34
CUK10-15S
CUK10-15S-X1391
CUK10-15S-X1551
CUK10-15T
CUK10-20D
CUK10-20D-XC34
CUK10-25D
CUK10-25D-XC34
CUK10-30D
CUK10-50D
CUK10-5D
CUK10-5D-XC34
CUK10-5S
CUK10-5T
CUK10-60D-XC34
CUK10-E0160-10
