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nfulton
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stembolts_dataset

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Split (3)

train · 1.2k rows

input stringlengths 44 76	part stringclasses 20 values	diag_confidence float64 0.26 0.99
seal ring has flat spot from prolonged storage under compression	seal ring	0.58
oil leaks when self-sealing apparatus is oriented between 0.5 - 0.6 radians	gasket	0.8
locking mechanism engages but does not hold under shock loading	locking mechanism	0.72
flange bolt elongation measured, 9 of 12 bolts yield-stretched	flange	0.83
sleeve to shaft clearance increased by 33% from original	coupling sleeve	0.59
retention clip fractured at bend radius during removal	retention clip	0.57
coupling sleeve OD corroded from exposure to cutting oil	coupling sleeve	0.8
stem shaft chrome plating cracked and flaking at seal zone	stem shaft	0.57
axial endplay measured at 0.04mm, spec is 0.02mm max	bearing	0.92
actuator output shaft seal leaking hydraulic fluid	actuator	0.51
diamond pin not allowing for thermal growth, binding at 80C	alignment pin	0.75
torque limiter reset mechanism jammed in tripped position	torque limiter	0.54
thread cross-threading reported by 9 different installation crews	thread assembly	0.51
locking mechanism pawl worn to 83% of original thickness	locking mechanism	0.58
spring tangling in assembly, wrong wire diameter suspected	compression spring	0.4
customer notes leak worsens proportionally with shaft speed	seal ring	0.8
stem shaft surface hardness measured at HRC 45, spec is HRC 58-64	stem shaft	0.67
high-pitched whine from unit during operation between 2500-6000 RPM	bearing	0.74
coupling sleeve keyway damaged from improper installation	coupling sleeve	0.75
retention clip material fatigue from 20000 vibration cycles	retention clip	0.71
actuator diaphragm ruptured during pressure spike event	actuator	0.64
regulator lockup pressure 52% above setpoint under no-flow condition	pressure regulator	0.6
spring fatigue fracture at 3.4 turns from active end	compression spring	0.41
unit leaks only when mounted horizontally, fine in other positions	gasket	0.26
intermittent seal failure, cannot reproduce in shop conditions	valve core	0.48
valve core soft seat material worn through to metal substrate	valve core	0.85
collar locking feature stripped, collar free to rotate on shaft	collar	0.8
customer hears a pop sound when self-seal first engages	compression spring	0.62
retention clip deformed during over-torque event at installation	retention clip	0.96
intermittent seal failure, cannot reproduce in shop conditions	valve core	0.74
mechanism cycles 7 times before failing to lock, spec is 1000	locking mechanism	0.82
customer reports intermittent failure to engage in humid environments	actuator	0.75
torque readings inconsistent between -30-80 Nm range	torque limiter	0.72
customer reports dry running noise during first 20 seconds of start	bushing	0.47
torque limiter spring preload decayed 87% from original set	torque limiter	0.51
regulator lockup pressure 43% above setpoint under no-flow condition	pressure regulator	0.61
regulator hysteresis of 0.6 kPa between increasing and decreasing flow	pressure regulator	0.73
customer notes leak worsens proportionally with shaft speed	seal ring	0.77
fretting debris visible at collar-to-shaft interface	collar	0.74
seal ring lip torn, likely during assembly process	seal ring	0.66
stem shaft chrome plating cracked and flaking at seal zone	stem shaft	0.82
bearing temperature 60C above baseline during operation	bearing	0.94
torque limiter clutch plates glazed from repeated slip events	torque limiter	0.84
collar surface finish degraded, measured Ra 4.2 vs spec Ra 1.0	collar	0.48
visible extrusion of seal ring material into clearance gap	seal ring	0.78
pilot signal required to shift valve core exceeds 6.4 kPa	valve core	0.32
fluid weeping from gasket joint under 3.0 kPa static pressure	gasket	0.89
o-ring extruded from groove under 8 kPa sustained pressure	o-ring	0.72
thread cross-threading reported by 3 different installation crews	thread assembly	0.76
bushing squeaks during slow rotation, silent at operating speed	bushing	0.67
flange bolt hole cracking observed at 2 o'clock position	flange	0.82
bearing temperature 70C above baseline during operation	bearing	0.91
customer reports same vibration issue across multiple replacement units	dampener	0.91
casting porosity found in housing near high-stress region	housing	0.77
customer says bolt worked for a week then suddenly stopped sealing	valve core	0.41
gasket groove corroded, preventing proper gasket seal	gasket	0.33
interference fit between coupling sleeve and housing lost	coupling sleeve	0.64
actuator travel reduced to 53% of full stroke	actuator	0.65
torque limiter cycling between slip and grip under steady load	torque limiter	0.67
dampener body dented from external impact, piston binding	dampener	0.47
clip ejected from groove during 4.4 kPa pressure event	retention clip	0.84
corrosion visible on outer housing near fluid contact zone	housing	0.75
torsional windup of 1.3 degrees measured on stem shaft under load	stem shaft	0.88
retention clip corrosion products contaminating seal area	retention clip	0.66
spring tangling in assembly, wrong wire diameter suspected	compression spring	0.93
torque limiter spring preload decayed 82% from original set	torque limiter	0.79
coupling sleeve fractured at stress concentration notch	coupling sleeve	0.47
collar clamping force measured at 64% of minimum specification	collar	0.76
thread class fit too tight, requires excessive assembly torque	thread assembly	0.64
dampener bottoming out during high-amplitude vibration test	dampener	0.66
leakage rate of 2.0 mL/hr at the gasket seam, above tolerance	gasket	0.39
torque limiter engagement lag of 100ms under rapid load application	torque limiter	0.42
retention clip deformed during over-torque event at installation	retention clip	0.73
bushing press fit loosened after 1000 thermal cycles	bushing	0.61
dampener fluid level low, possible slow leak from housing	dampener	0.53
seal ring cracked circumferentially at 10 o'clock position	seal ring	0.77
torque limiter clutch plates glazed from repeated slip events	torque limiter	0.78
lead angle error causing bolt to bind at 4.3 turns engagement	thread assembly	0.87
pressure regulator sticking during rapid pressure changes	pressure regulator	0.74
customer says bolt worked for a week then suddenly stopped sealing	valve core	0.72
torque limiter calibration drifted 11% over service interval	torque limiter	0.46
sleeve to shaft clearance increased by 89% from original	coupling sleeve	0.49
unit leaks only when mounted vertically, fine in other positions	gasket	0.73
hairline crack found on stem shaft during ultrasonic inspection	stem shaft	0.96
bushing operating temperature 65C above expected steady-state value	bushing	0.73
surface cracking visible on o-ring under 50x magnification	o-ring	0.8
actuator stalls under load at 30% of rated capacity	actuator	0.77
flash from o-ring molding process interfering with seal contact	o-ring	0.89
locking mechanism pawl worn to 93% of original thickness	locking mechanism	0.92
bushing squeaks during slow rotation, silent at operating speed	bushing	0.54
bushing operating temperature 110C above expected steady-state value	bushing	0.76
flash from o-ring molding process interfering with seal contact	o-ring	0.78
retention clip deformed during over-torque event at installation	retention clip	0.87
flange bolts found finger-tight during inspection	flange	0.56
seal ring groove shows wear marks indicating improper installation	seal ring	0.52
bushing worn oval, clearance doubled from original spec	bushing	0.88
actuator fails to retract fully, self-seal remains partially engaged	actuator	0.33
dampener bushing eye worn, causing clunking under load reversal	dampener	0.7
bushing operating temperature 50C above expected steady-state value	bushing	0.87
leakage rate of 1.7 mL/hr at the gasket seam, above tolerance	gasket	0.88

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