液压马达是液压系统的一种执行元件，它将液压泵提供的液体压力能转变为其输出轴的机械能(转矩和转速)。液体是传递力和运动的介质。液压马达，亦称为油马达，主要应用于注塑机械、船舶、起扬机、工程机械、建筑机械、煤矿机械、矿山机械、冶金机械、船舶机械、石油化工、港口机械等。
轴向柱塞泵除阀式配流外，其它形式原则上都可以作为液压马达用，即轴向柱塞泵和轴向柱塞马达是可逆的。轴向柱塞马达的工作原理为，配油盘和斜盘固定不动，马达轴与缸体相连接一起旋转。当压力油经配油盘的窗口进入缸体的柱塞孔时，柱塞在压力油作用下外伸，紧贴斜盘，斜盘对柱塞产生一个法向反力p，此力可分解为轴向分力及和垂直分力Q。Q与柱塞上液压力相平衡，而Q则使柱塞对缸体中心产生一个转矩，带动马达轴逆时针方向旋转。轴向柱塞马达产生的瞬时总转矩是脉动的。若改变马达压力油输入方向，则马达轴按顺时针方向旋转。斜盘倾角a的改变、即排量的变化，不仅影响马达的转矩，而且影响它的转速和转向。斜盘倾角越大，产生转矩越大，转速越低。4系列变量柱塞泵：
A10VSO18DFR1/31R-PPA12NOO、
A10VSO28DFR1/31R-VPA12N00、
A10VSO45DFR1/32R-PPB12N00、
A10VSO71DFR1/32R-VPB22U99
A10VSO100DFR1/32R-VPB12N00、
A10VSO140DRS/32R-VPB22U99等
A4VSO71DR/30R-PPB13N00
A4VSO125DR/30R-PPB13N00
A4VSO180DR/30R-PPB13
A4VSO250DR/30R-PPB13NOO等
A4VSO40LR2G/10R-PPB13N00
A4VSO71DFR/10X-PPB13N00
A4VSO71DR/10X-PPB13N00
A4VSO71DRG/10X-PPB13N00
A4VSO71LR2/10R-PPB13N00
A4VSO71LR2D/10R-PPB13N00
A4VSO125DFR/22R-PPB13N00
A4VSO125DR/22R-PPB13N00
A4VSO125DR/22R-VPB13N00
A4VSO125LR2/22R-PPB13N00
A4VSO125LR2G/22R-PPB13N00
A4VSO125LR2N/22R-PPB13N00
A4VSO180LR2N/22R-PPB13N00
A4VSO250DFR/30R-PPB13N00
A4VSO250DR/30R-PPB13N00
A4VSO250DRG/30R-PPB13N00
A4VSO250LR2/30R-PPB13N00
A4VSO250LR2G/30R-PPB13N00
A4VSO250LR2N/30R-PPB13N00
A4VSO180DFR/22R-PPB13N00
A4VSO180DR/22R-PPB13N00
A4VSO180DRG/22R-PPB13N00
柱塞泵 A4VG90HWD1/32R-NZF001S
柱塞泵 A4VTG90HW/32R-NLD10F001S
轴向柱塞泵 A4VSO125DR/PPB13NOO
变量轴向柱塞泵 A4VSO180DR/30R-PPB13N00
变量轴向柱塞泵 A4VSO125DR/30R-PPB13N00
柱塞泵 A4VS0125DR/10R-PPB13N00
柱塞泵 A4VS071DR/10R-PPB13N00
柱塞泵 A4VS0125DR/22R
变量泵 A4VSO250EO2/30R-VPB13N00-SO2
柱塞泵 A4VG125EP2MT1/32-NZF02F021SH-S
柱塞泵 A4VSO250EO2/30R-VPB13N00-SO2
变量轴向柱塞泵 A4VSO180DR/30R-PPB13N00
变量轴向柱塞泵 A4VSO125DR/30R-PPB13N00
油泵 A4VSO180DFR/30R-PPB13N00
柱塞泵 A4VS0180DR/30R-PPB13N00
轴向柱塞泵主泵 A4VS0125DRG/30R-PPB13N00
油泵 A4VS071DR/30R-PPB13N00
德国力士乐A4VG-125泵的配件 主轴 080121-001#
轴向柱塞泵 E-A4VSO250EO2/30R-VPB25N00-SO3
轴向柱塞泵 E-A4VSO250EO2/30R-VPB25N00-SO3
柱塞泵 A4VSO180DR/30R-FPB13N00
恒压变量泵 E-A4VS0125DR/22R-VPB13N00
柱塞泵 A4VSO180DR/30R-FPB13N00
柱塞泵 A4VS0180LR2G/30R-PPB13NOO
柱塞泵 A4VSO250LR2D/30R-PPB13NOO
柱塞泵 A4VSO250DR/30R-PPB13NOO
泵 A4VG56EZ2DM1/32-NSC02F003F

但是，由于液压马达和液压泵的工作条件不同，对它们的性能要求也不一样，所以同类型的液压马达和液压泵之间，仍存在许多差别。首先液压马达应能够正、反转，因而要求其内部结构对称;液压马达的转速范围需要足够大，特别对它的稳定转速有一定的要求。因此，它通常都采用滚动轴承或静压滑动轴承;其次液压马达由于在输入压力油条件下工作，因而不必具备自吸能力，但需要一定的初始密封性，才能提供必要的起动转矩。由于存在着这些差别，使得液压马达和液压泵在结构上比较相似，但不能可逆工作。MR500F-F1N1N1S1NX0701/58323
MR500F-F1N1N1S1NX0900/59830
MR500F-F2N1N1C1NX0902/60886
MR500F-F2N1N1N1NX0701/34963-B
MR500F-F2N1N1S3NX0800/59444-B
MR500F-F2N1N1S3NX0902/60825-B
MR500F-F2N1N2N1NX0902/60824-B
MR500F-F2N1N2S3NX0900/59439-B
MR57A-F1N1V1S1N0200/58481
MR57A-N1N1V1S1N0200/58366
MR57A-P1N1N1N1N0000/34768
MR57A-P1N1N1N1N0001/58006
MR57A-P1N1N1S1N0200/58738
MR57A-P1N1V1N1N0200/58373
MR600F-D1B1N1N1N0101/58722
MR600F-D1N1N1C1N0900/59540
MR600F-D1N1U1N1N0101/34878
MR600F-F1N1N1N1N0101/45465
MR600F-F2N1N1C1NX0101/58953
MR600F-F2N1N1C1NX0900/59595
MR600F-F2N1N1N1NX0101/34934-B
MR600F-N1N1N1N1N0101/46448
MR600F-N1N1N1N1N0900/59576
MR600F-P1N1N1C1N0900/59656
MR600F-P2N1F1N1N0900/60322
MR6500M-D2N1N1N1NX0500/60293
MR7000M-F1M1N2N1NX0500/59319
MR7000M-F2N1N1N1N0500/58990
MR7000M-F2N1N1N1NX0400/58206
MR7000M-F2N1N1N1NX0500/59517
MR7000M-F2N1N1S3NX0500/59346
MR7000M-N1N1N1N1N0500/58756
MR7000M-P1N1N1N1N0200/45561
MR700F-D1B1N1N1N0902/60942
MR700F-D1N1N1N1N0900/59377
MR700F-F1N1N1S1NX0800/59358
MR700F-F1N1N1S1NX0902/60844
MR700F-F2N1N1C1NX0701/58036
MR700F-F2N1N1C1NX0701/58038
MR700F-F2N1N1C1NX0900/59552
MR700F-F2N1N1C1NX0900/59807
MR700F-F2N1N1N1NX0701/34931-B
MR700F-F2N1N1S3NX0902/60826-B
MR700F-F2N1N2N1NX0902/60790-B
MR700F-F2N1N2S3NX0902/60968-B
MR700F-N1B1N1S1N0900/60392
MR700F-N1C1N1N1N0701/45415
MR700F-N1N1N1N1N0900/59378
MR700F-N1N1N1S1N0701/58527
MR700F-N1Q1N1N1N0902/60872
MR700F-N1T1N1N1N0900/59700
MR700F-N1T1N1N1N0901/56698
MR700F-P1N1N1C1N0900/59565
MR700F-P1N1N1N1N0900/59454
MR700F-P1Q1N1N1N0701/34591
MR700F-P2Q1N2N1NX0900/59915
MR93B-N1Q1V1C1N0000/59128
MR93B-P1N1N1N1N0000/33325
MRA1600G-F2N1N1S3NX0100/54793
MRA2400H-F2N1N1N1NX0100/58825
MRA2400H-F2N1N1S4NX0100/54794

折叠高速马达
额定转速高于500r/min的马达属于高速马达。高速马达的基本形式有齿轮式、叶片式和轴向柱塞式。它们主要特点是转速高，转动惯量小，便于启动、制动、调速和换向。

轴向柱塞泵除阀式配流外，其它形式原则上都可以作为液压马达用，即轴向柱塞泵和轴向柱塞马达是可逆的。轴向柱塞马达的工作原理为，配油盘和斜盘固定不动，马达轴与缸体相连接一起旋转。当压力油经配油盘的窗口进入缸体的柱塞孔时，柱塞在压力油作用下外伸，紧贴斜盘，斜盘对柱塞产生一个法向反力p，此力可分解为轴向分力及和垂直分力Q。Q与柱塞上液压力相平衡，而Q则使柱塞对缸体中心产生一个转矩，带动马达轴逆时针方向旋转。轴向柱塞马达产生的瞬时总转矩是脉动的。若改变马达压力油输入方向，则马达轴按顺时针方向旋转。斜盘倾角a的改变、即排量的变化，不仅影响马达的转矩，而且影响它的转速和转向。斜盘倾角越大，产生转矩越大，转速越低。
MR190C-P1N1V1C1N0300/60083
MR190C-P1Q1V1C1N0300/59659
MR200D-F2N1N1C1NX0500/59286
MR200D-F2N1N1N1NX0500/59331-A
MR200D-F2N1N2N1NX0500/59151-A
MR225CA-F1N1N1C1N0100/56720
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MR2400I-F1N1N1S3NX0300/59341-D
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MR2400I-F2N1N1S3NX0300/59340-C
MR2400I-N1N1N1L1N0300/58315
MR2400I-P1N1V1C1N0300/59238
MR2400I-P1Q1N1C1N0300/58673
MR2400I-P1T1N1N1N0300/58568
MR250D-D1B1U1N1N0500/60644
MR250D-D1N1N1N1N0500/59690
MR250D-F2N1N1C1NX0502/60793
MR250D-F2N1N1N1NX0502/60874-A
MR250D-F2N1N2N1NX0502/61011-A
MR250D-N1N1N1N1N0001/45245
MR250D-P1B1N1S1N0001/34732
MR250D-P1E1N1N1N0001/34344
MR250D-P1N1N1C1N0000/53031
MR250D-P1N1N1C1N0500/59221
MR250D-P1N1N1N1N0500/59086
MR250D-P1Q1N1C1N0001/58348
MR250D-P1Q1N1N1N0001/34449
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