Unique speed capabilities for high-torque applications

Off-Set Fixtured Nutrunner QST

The Atlas Copco QST off-set fixtured nutrunner provides the high reliability, accuracy, and capability of the QST platform in an offset spindle configuration that reaches fasteners laterally displaced from the motor axis, enabling fixture designs that compact multiple spindles tightly around complex joint patterns. The controller automatically manages bus voltage for larger QST80 and QST90 units, providing unique speed performance at high torques without additional hardware.

Off-set spindle for laterally displaced fastener access in tight fixtures
Enables compact multi-spindle fixture designs around complex joint patterns
Automatic bus voltage management for QST80/90 high-torque performance
High reliability and accuracy across demanding production volumes

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Products in this range

Off-Set Fixtured Nutrunner QST models.

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Product	SKU / Model	Key specifications
QST50-150COATT-T50-L137-H13	8435 6050 80	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 51 Weight: 8.3 kg
QST42-20COTT-T50-L134-H10	8435 6020 60	Torque range: 4 ft-lb-14 ft-lb Min C-C: 31 Weight: 9.3 lb
QST50-150COT-T50-L137-H13	8435 6050 20	Torque range: 22 ft-lb-110 ft-lb Min C-C: 37 Weight: 17.2 lb
QST50-150COTT-T50-L137-H13	8435 6050 60	Torque range: 22 ft-lb-110 ft-lb Min C-C: 37 Weight: 17.2 lb
QST42-50COT-T50-L134-H13	8435 6030 20	Torque range: 7 ft-lb-35 ft-lb Min C-C: 31 Weight: 9.9 lb
QST42-20COATT-T50-L134-H10	8435 6020 80	Torque range: 3 ft-lb-14.8 ft-lb Min C-C: 43 Weight: 10.4 lb
QST42-20COT-T50-L134-H10	8435 6020 20	Torque range: 4 ft-lb-14 ft-lb Min C-C: 31 Weight: 9.3 lb
QST50-90COT-T50-L137-H13	8435 6040 20	Torque range: 15 ft-lb-65 ft-lb Min C-C: 37 Weight: 17.2 lb
QST42-50COTT-T50-L134-H13	8435 6030 60	Torque range: 7 ft-lb-35 ft-lb Min C-C: 31 Weight: 9.9 lb
QST90-750COT-T50-L152-H25	8435 6085 20	Torque range: 111 ft-lb-553 ft-lb Min C-C: 63 Weight: 64 lb
QST62-230COT-T50-L152-H19	8435 6065 20	Torque range: 29 ft-lb-162 ft-lb Min C-C: 45 Weight: 28.2 lb
QST80-450COT-T50-L146-H19	8435 6075 20	Co:: SE .: Torque range 66 ft-lb: -
QST90-1000COT-T50-L152-H25	8435 6090 20	Torque range: 147 ft-lb-737 ft-lb Min C-C: 63 Weight: 66 lb
QST62-230COTT-T50-L152-H19	8435 6065 60	Torque range: 29 ft-lb-162 ft-lb Min C-C: 45 Weight: 28.2 lb
QST62-150COT-T50-L152-H13	8435 6060 20	Torque range: 22 ft-lb-110 ft-lb Min C-C: 45 Weight: 28.2 lb
QST62-350COT-T50-L152-H19	8435 6070 20	Torque range: 37 ft-lb-243 ft-lb Min C-C: 49 Weight: 28.2 lb
QST80-600COT-T50-L146-H19	8435 6080 20	Torque range: 88 ft-lb-442 ft-lb Min C-C: 55 Weight: 46 lb
QST62-350COTT-T50-L152-H19	8435 6070 60	Torque range: 37 ft-lb-243 ft-lb Min C-C: 45 Weight: 28.2 lb
QST62-230COATT-T50-L152-H20	8435 6065 80	Torque range: 36.9 ft-lb-169.6 ft-lb Min C-C: 43 Weight: 13.7 kg
QST95-1750COT-T50-L155-H38	8435 6095 20	Torque range: 258 ft-lb-1291 ft-lb Min C-C: 73 Weight: 94.8 lb
QST80-600COTT-T50-L146-H19	8435 6080 60	Torque range: 88 ft-lb-442 ft-lb Min C-C: 55 Weight: 46 lb
QST62-340CTO-T30	9831 4041 51	Torque range: 50.2 ft-lb-250.8 ft-lb Min C-C: 251 Weight: 58.4 kg
QST90-1000CT-T50-H25/QST42-50CTO	9831 4041 32	Torque range: 147.5 ft-lb-737.6 ft-lb Min C-C: 217 Weight: 39.5 kg
QST90-750CT-T40H25/QST50-250CTO	9831 4041 55	Torque range: 36.9 ft-lb-184.4 ft-lb Min C-C: 109 Weight: 43 kg
QST80-600CT/QST42-125CTO	9831 4041 18	Torque range: 18.4 ft-lb-92.2 ft-lb Min C-C: 161 Weight: 44.5 kg
QST95-1600CT/QST42-150CTO	9831 4041 04	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 171 Weight: 47.6 kg
QST34-20CT-T50/QST50-90CTO-T25	9831 4041 82	Torque range: 13.3 ft-lb-66.4 ft-lb Min C-C: 65 Weight: 11.7 kg
QST95-2000CT-T50-H19/QST42-50CTO	9831 4042 76	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 191 Weight: 50.5 kg
QST50-150CT-T50-H19/QST42-50CTO	9831 4042 68	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 171 Weight: 27 kg
QST80-450CTO-T50-L240-H25	9831 4042 49	Torque range: 66 ft-lb-332 ft-lb Speed: 265 r/min
QST62-230CT-T50-H19/QST50-150CTO	9831 4042 29	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 155 Weight: 32 kg
QST50-90COT-H13/QST80-1000CTO	9831 4042 86	Torque range: 147.5 ft-lb-737.6 ft-lb Min C-C: 220 Weight: 85 kg
QST80-450CT/QST42-120CTO	9831 4042 16	Torque range: 17.7 ft-lb-88.5 ft-lb Min C-C: 161 Weight: 44 kg
QST80-600CT/QST80-550CTO	9831 4042 30	Torque range: 81 ft-lb-406 ft-lb Min C-C: 161 Weight: 56 kg
QST90-1000CT-T50-H25/QST50-90CTO	9831 4042 59	Torque range: 147 ft-lb-737 ft-lb Min C-C: 171 Weight: 44.5 kg
QST62-350CT-T50-H19/QST42-50CTO	9831 4042 40	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 155 Weight: 32 kg
QST80-600CTT-T50-H19/QST42-200CTT-AA-O	9831 4042 57	Torque range: 29.5 ft-lb-147.5 ft-lb Min C-C: 171 Weight: 37 kg
QST62-230CT-T50-H19/QST50-90CTO	9831 4042 71	Torque range: 13.3 ft-lb-66.4 ft-lb Min C-C: 171 Weight: 34 kg
QST34-20CT-T50/QST42-50CTO-T25	9831 4042 48	Torque range: 7.4 ft-lb-37 ft-lb Min C-C: 45 Weight: 8.9 kg
QST42-50COT-T50-L134-H10	9831 4077 24	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 31 Weight: 4.8 kg
QST42-50CTTAO-SPN250-H13	9831 4077 32	Torque range: 7.38 ft-lb-36.9 ft-lb Min C-C: 61 Weight: 12.1 kg
QST42-50COT-T76-L161-H13	9831 4077 54	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 31 Weight: 5.1 kg
QST50-150CATTO-T250-L360-H13-SPN	9831 4078 69	Torque range: 22 ft-lb-110 ft-lb Min C-C: 55 Weight: 15 kg
QST50-70CTTAO-T350-L536-H19	9831 4078 79	Torque range: 10.3 ft-lb-51.6 ft-lb Min C-C: 71 Weight: 23.5 kg
QST34-8CT/QST42-70CTO	9831 4086 28	Torque range: 1.18 ft-lb-5.9 ft-lb Min C-C: 45 Weight: 8.5 kg
QST80-600COT-T76-L173-H19	9831 4084 15	Torque range: 88.5 ft-lb-442.5 ft-lb Min C-C: 55 Weight: 23 kg
QST80-400CTTAO-SPN350-H20	9831 4084 38	Torque range: 66.38 ft-lb-331.9 ft-lb Min C-C: 96 Speed: 265 r/min
QST34-8CT-T50/QST50-90CTO-T25	9831 4086 21	Torque range: 13.28 ft-lb-66.38 ft-lb Min C-C: 65 Weight: 11.7 kg
QST80-440CTO-T30-L146-H20	9831 4084 50	Torque range: 64.9 ft-lb-324.5 ft-lb Min C-C: 41 Weight: 22.5 kg
QST62-160CATTO-T250-L360-H13-SPN	9831 4087 17	Torque range: 23.6 ft-lb-118 ft-lb Min C-C: 63 Weight: 10 kg
QST50-150CTTAO-T500-L610-H13-SPN	9831 4091 70	Torque range: 22.12 ft-lb-110.6 ft-lb Min C-C: 61 Speed: 380 r/min
QST62-350COT-T76-L178-H20	9831 4089 89	Torque range: 51.63 ft-lb-258.1 ft-lb Min C-C: 63 Weight: 16 kg
QST42-50CTTAO-T250-L360-H13-SPN	9831 4094 55	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 29 Weight: 12 kg
QST34-20CTO-T50-L150-H10	9831 4086 47	Torque range: 2.95 ft-lb-14.8 ft-lb Min C-C: 35 Weight: 2.4 kg
QST50-140CTTOHAD	9831 4091 67	Torque range: 20.65 ft-lb-103.3 ft-lb Min C-C: 65 Weight: 10 kg
QST114-2200COT-T50-L155-H38	9831 4095 29	Torque range: 324.5 ft-lb-1622.6 ft-lb Min C-C: 41 Weight: 45.3 kg
QST42-20CT/QST42-50CTO-T50	9831 4094 40	Torque range: 7 ft-lb-37 ft-lb Min C-C: 45 Weight: 3 kg
QST95-1500CTT-T50-H25/QST42-125CTO	9831 4092 57	Torque range: 18 ft-lb-92 ft-lb Min C-C: 200 Weight: 48 kg
QST62-300CTTAO-T350-L536-H19-SPN	9831 4087 05
QST62-230COT-T50-L202-H19	9831 4087 36	Torque range: 34 ft-lb-170 ft-lb Min C-C: 45 Weight: 13.3 kg
QST62-300CTTAO-T500-L650-H19-SPN	9831 4096 00	Torque range: 44.3 ft-lb-221.3 ft-lb Min C-C: 71 Weight: 30.5 kg
QST62-350COT-T150-L252-H20	9831 4089 81	Torque range: 51.6 ft-lb-258.1 ft-lb Min C-C: 43 Weight: 15.9 kg
QST50-80CTOHAD-T50	9831 4091 56	Torque range: 11.8 ft-lb-59 ft-lb Min C-C: 65 Speed: 600 r/min
QST50-90CTTAO-T350-H13-SPN	9831 4097 17	Torque range: 13.28 ft-lb-66.38 ft-lb Min C-C: 56 Weight: 16 kg
QST62-230COTHAD	9831 4096 13	Torque range: 33.93 ft-lb-169.6 ft-lb Min C-C: 83 Weight: 15.7 kg
QST62-160CTTAO-T500-L610-H13-SPN	9831 4103 71	Torque range: 23.6 ft-lb-118 ft-lb Min C-C: 61 Speed: 330 r/min
QST62-150COTTHAD	9831 4103 70	Torque range: 22 ft-lb-110 ft-lb Min C-C: 51 Weight: 15.7 kg
QST50-90CTTAO-T350-H13-SPN	9831 4102 47	Torque range: 13.28 ft-lb-66.38 ft-lb Min C-C: 56 Speed: 580 r/min
QST34-8CTO/QST34-8CTO	9831 4099 65	Torque range: 1.18 ft-lb-5.9 ft-lb Min C-C: 20 Weight: 6.3 kg
QST62-150CAOTTHAD	9831 4106 19	Torque range: 22.13 ft-lb-110.6 ft-lb Min C-C: 83 Weight: 15.7 kg
QST42-20COT-T50-L150-H10	9831 4101 76	Torque range: 3 ft-lb-14.8 ft-lb Min C-C: 26 Weight: 3.7 kg
QST62-230COT-T50-L152-H13	9831 4103 78	Torque range: 33.9 ft-lb-169.6 ft-lb Min C-C: 43 Weight: 13.2 kg
QST34-20CTOHAD-T50	9831 4099 49	Torque range: 2.95 ft-lb-14.75 ft-lb Min C-C: 40 Weight: 6.7 kg
QST42-20CT-A/QST42-80CTO	9831 4101 80	Torque range: 11.8 ft-lb-59 ft-lb Min C-C: 45 Weight: 9.6 kg
QST62-160CATTO-T350-L460-H13-SPN	9831 4103 51	Torque range: 24 ft-lb-118 ft-lb Min C-C: 56 Weight: 21.1 kg
QST62-230COT-T76-L178-H19	9831 4103 83	Torque range: 33.9 ft-lb-169.6 ft-lb Min C-C: 45 Weight: 15 kg
QST50-90COT-T50-L137-H13	9831 4102 63	Torque range: 14.7 ft-lb-66.3 ft-lb Min C-C: 51 Weight: 8 kg
QST80-400CTTAO-SPN	9831 4104 31	Torque range: 59 ft-lb-295 ft-lb Min C-C: 96 Weight: 18.1 kg
QST42-70CTOV-P13	9831 4101 54	Torque range: 10.3 ft-lb-52 ft-lb Min C-C: 41 Weight: 6 kg
QST62-350COT-T50-L252-H19	9831 4106 01	Torque range: 51.63 ft-lb-258.1 ft-lb Min C-C: 49 Weight: 14 kg
QST80-500CTTAO-T350-H19-SPN	9831 4104 71	Torque range: 74 ft-lb-369 ft-lb Min C-C: 36 Weight: 35 kg
QST50-150COT-T76-L190-H16	9831 4107 24	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 37 Weight: 9.7 kg
QST62-230CTTAO-T350-L536-H19-SPN	9831 4110 23	Torque range: 34 ft-lb-170 ft-lb Min C-C: 71 Weight: 28 kg
QST62-150COTTHAD	9831 4110 22	Torque range: 22 ft-lb-110 ft-lb Min C-C: 50 Weight: 15.4 kg
QST62-300CTO-T30/QST62-300CTO-T30	9831 4110 67	Torque range: 22 ft-lb-221 ft-lb Min C-C: 68 Weight: 43 kg
QST62-150CAOTTHAD	9831 4106 60	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 51 Weight: 15.7 kg
QST62-350COTHAD	9831 4110 04	Torque range: 51.6 ft-lb-258 ft-lb Min C-C: 83 Weight: 36.2 lb
QST90-750COT-T50-L352-H25	9831 4109 42	Torque range: 110.63 ft-lb-553.17 ft-lb Min C-C: 61 Weight: 30.5 kg
QST62-230COT-T50-L252-H19	9831 4110 41	Torque range: 29 ft-lb-170 ft-lb Min C-C: 45 Weight: 14.2 kg
QST62-150COTT-HAD	9831 4110 27	Torque range: 22 ft-lb-110 ft-lb Min C-C: 26 Weight: 15.5 kg
QST62-230COTHAD-T50-L150-20	9831 4110 08	Torque range: 32 ft-lb-162 ft-lb Min C-C: 51 Weight: 16.6 kg
QST50-150CTTAO-T350-H13-SPN	9831 4107 00	Torque range: 22 ft-lb-111 ft-lb Min C-C: 56 Weight: 15 kg
QST62-230COTHAD	9831 4110 03	Torque range: 29 ft-lb-162 ft-lb Min C-C: 51 Speed: 330 r/min
QST42-70CTOV-H13	9831 4108 30	Torque range: 10 ft-lb-52 ft-lb Min C-C: 40 Weight: 6 kg
QST90-1200COT-T50-L150-H25	9831 4109 03	Torque range: 177 ft-lb-885 ft-lb Min C-C: 65 Weight: 33 kg
QST42-50CTOHAD-T50	9831 4108 34	Torque range: 7 ft-lb-35 ft-lb Min C-C: 65 Weight: 9.5 kg
QST50-140CTTAOHAD-T50-L267-H19	9831 4107 78	Torque range: 21 ft-lb-103 ft-lb Min C-C: 65 Weight: 25 lb
QST95-1300COT-T50-L155-H38	9831 4109 53	Torque range: 192 ft-lb-959 ft-lb Min C-C: 77 Weight: 43 kg
QST50-90COT-T76-L170-H13	9831 4107 93	Torque range: 13 ft-lb-66 ft-lb Min C-C: 37 Weight: 8.6 kg
QST62-150COTTHAD	9831 4110 87	Torque range: 22.1 ft-lb-111 ft-lb Min C-C: 83 Weight: 15 kg
QST62-150CTO-T30-H13	9831 4114 30	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 29 Weight: 13.5 kg
QST42-50COT-T125-L211-H10	9831 4115 12	Torque range: 7.4 ft-lb-36.9 ft-lb Min C-C: 31 Weight: 5.6 kg
QST62-230COTT-T50-L352-H19	9831 4114 38	Torque range: 33.9 ft-lb-169.6 ft-lb Min C-C: 49 Weight: 15.4 kg
QST80-450COT-T76-L173-H19	9831 4112 22	Torque range: 66 ft-lb-332 ft-lb Min C-C: 55 Weight: 23 kg
QST80-550CTTAO-HAD	9831 4112 31	Torque range: 81.1 ft-lb-405.7 ft-lb Min C-C: 163 Weight: 39 kg
QST62-350COT-T50-L302-H19	9831 4114 25	Torque range: 51.6 ft-lb-258.1 ft-lb Min C-C: 49 Weight: 14.1 kg
QST50-150COT-T50B-L137-H13	9831 4116 20	Torque range: 22.1 ft-lb-110.6 ft-lb Min C-C: 37 Weight: 8 kg
QST62-230COT-T50-L352-H19	9831 4114 54	Torque range: 29 ft-lb-162 ft-lb Min C-C: 45 Weight: 14.6 kg
QST62-230COTHAD	9831 4114 53	Torque range: 33.9 ft-lb-169.6 ft-lb Min C-C: 26 Weight: 15.5 kg

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