safety factor; factor of safety 安全系数
scale 比例尺
scoring 胶合
screw 螺杆
screw efficiency 螺纹效率
screw mechanism 螺旋机构
screw nut 螺母
screws 螺钉
seal 密封
seal belt 密封带
seal gum 密封胶
sealing arrangement 密封装置
section 截面
self-aligning ball bearing 调心球轴承
self-aligning bearing 调心轴承
self-aligning roller bearing 调心滚子轴承
self-locking 自锁
series combined mechanism 串联式组合机构
serration spline 三角形花键
shaft 轴
shaft angle 轴角
shaft collar 轴环
shaft end ring 轴端挡圈
shaft shoulder 轴肩
shaking couple 振动力矩
shaper 牛头刨床
shockproof device 防振装置
shocks; shock-absorber 缓冲装置
silent chain 齿形链、无声链
simple harmonic motion 简谐运动
sine generator, scotch yoke 正弦机构
single row bearing 单列轴承
single universal joint 单万向联轴节
single-direction thrust bearing 单向推力轴承
singular position 奇异位置
six-bar linkage 六杆机构
slack-side 松边
sleeve 套筒
slider 滑块
slider-crank (or crank-slider) mechanism 曲柄滑块机构
sliding bearing 滑动轴承
sliding ratio 滑动率
slipping 打滑
solid lubricant 固体润滑剂
spacewidth 齿槽宽
spatial cam 空间凸轮机构
spatial kinematic chain 空间运动链
spatial kinematic pair 空间运动副
spatial linkage 空间连杆机构
spatial mechanism 空间机构
special kinematic chain 特殊运动链
specific heat capacity 比热容
speed change 变速
speed control system 调速系统
speed fluctuation 速度波动
speed governing 调速
speed reducer 减速器
speed-changing gear boxes 齿轮变速箱
sphere-pin pair 球销副
spheric pair 球面副
spherical involute 球面渐开线
spherical motion 球面运动
spindle 心轴
spiral bevel gear 曲齿锥齿轮
spiral seal 螺旋密封
spline 花键
spontaneous ignition 燃点
sprocket ; sprocket-wheel ; sprocket gear ; 链轮
spur gear 直齿圆柱齿轮
square threaded form 矩形螺纹
square-jaw positive-contact clutch 矩形牙嵌式离合器
stack mounting 组合安装
standard gear 标准齿轮
standard spur gear 标准直齿轮
starting period 起动阶段
starting torque 启动力矩
static balance 静平衡
static equivalent axial load 轴向当量静载荷
static equivalent radial load 径向当量静载荷
static force 静力
static load 静载荷
static seal 静密封
steady motion period 稳定运转阶段
step pulley 塔轮
stepless speed changes devices 无级变速装置
stiffness coefficient 刚度系数
stopping phase 停车阶段
straight bevel gear 直齿锥齿轮
straight shaft 直轴
straight sided normal worm 法向直廓蜗杆
stress amplitude 应力幅
stress concentration 应力集中
stress diagram 应力图
stress-strain diagram 应力—应变图
structural design 结构设计
structure 结构
studs 双头螺柱
sub-mechanism 子机构
subroutine 子程序
sun gear 太阳轮
sunk key 嵌入键
superficial mass factor 表面质量系数
surface coefficient of heat transfer 表面传热系数
surface roughness 表面粗糙度
swiveling speed ; rotating speed 转速
symmetry circulating stress 对称循环应力
synchronous belt 同步带
synchronous belt drive 同步带传动
synthesis of mechanism 机构综合