Datasets:
nfulton
/
stembolts_dataset

Dataset card Data Studio Files
xet
 Community
1
input
stringlengths
44
76
part
stringclasses
20 values
diag_confidence
float64
0.26
0.99
coupling sleeve fractured at stress concentration notch
coupling sleeve
0.78
bearing cage fractured, rollers displaced from raceways
bearing
0.86
housing fastener boss pulled out under 30 Nm torque
housing
0.59
unit overheats during sustained operation above 1500 RPM
bearing
0.76
pressure regulator output oscillates +/- 1.6 kPa at steady state
pressure regulator
0.37
alignment pin pressed in too deep at factory, not engaging mating hole
alignment pin
0.94
pressure regulator output oscillates +/- 0.2 kPa at steady state
pressure regulator
0.61
bolt cannot be tightened past 45 Nm, feels like internal obstruction
thread assembly
0.78
retention clip yield marks visible, permanently deformed
retention clip
0.56
intermittent pressure spikes to 5x setpoint during transients
pressure regulator
0.79
bushing retaining feature damaged, bushing can walk axially
bushing
0.52
bushing running clearance measured at 0.017mm, spec is 0.012mm
bushing
0.5
mating holes misaligned by 0.06mm, pins binding on insertion
alignment pin
0.72
fretting debris visible at collar-to-shaft interface
collar
0.67
alignment pin hole elongated, pin fits loosely on reassembly
alignment pin
0.8
thread stripping at 25 Nm, rated for 31 Nm minimum
thread assembly
0.79
locking mechanism pawl worn to 12% of original thickness
locking mechanism
0.92
collar interference fit lost, now slip fit after thermal events
collar
0.47
customer reports stembolt loosens after 5000 hours of continuous vibration
locking mechanism
0.55
gasket failed bubble test at 10.7 kPa differential
gasket
0.68
regulator relief valve weeping at 45% below rated crack pressure
pressure regulator
0.75
spring tangling in assembly, wrong wire diameter suspected
compression spring
0.87
flange parallelism out by 0.07mm across 200mm diameter
flange
0.48
locking mechanism does not fully disengage, partial lock persists
locking mechanism
0.54
transmitted torque ripple of 65% measured at output shaft
torque limiter
0.67
dampener bushing eye worn, causing clunking under load reversal
dampener
0.47
bushing OD spinning in housing bore, lost interference fit
bushing
0.61
stress crack propagating from housing relief groove
housing
0.58
thread plating peeling, causing rough engagement feel
thread assembly
0.8
vacuum side o-ring leaks at 12.9 kPa differential
o-ring
0.86
actuator spring return force insufficient for reliable closure
actuator
0.37
torque limiter spring preload decayed 95% from original set
torque limiter
0.63
valve core stem bent 0.05mm, causing binding in guide bore
valve core
0.83
coupling sleeve scored on inner diameter from debris ingestion
coupling sleeve
0.7
pilot signal required to shift valve core exceeds 10.7 kPa
valve core
0.69
alignment pin dowel hole ovality causing 0.7mm positional error
alignment pin
0.66
thread stripping at 45 Nm, rated for 35 Nm minimum
thread assembly
0.81
pin extraction force measured at 64N, spec is 171N minimum
alignment pin
0.81
housing wall thickness reduced by 91% from internal erosion
housing
0.85
stem shaft chrome plating cracked and flaking at seal zone
stem shaft
0.57
intermittent pressure spikes to 2x setpoint during transients
pressure regulator
0.77
visible extrusion of seal ring material into clearance gap
seal ring
0.64
compression spring hydrogen embrittlement from plating process
compression spring
0.52
housing bore surface finish degraded to Ra 5.2 from wear
housing
0.7
collar to shaft concentricity measured at 0.025mm TIR
collar
0.61
installation mechanic notes excessive play in coupling sleeve fit
coupling sleeve
0.66
flange weld HAZ shows micro-cracking under dye penetrant test
flange
0.59
resonance amplitude increased 4x at natural frequency since install
dampener
0.79
bearing running rough during manual rotation check
bearing
0.56
customer says bolt worked for a week then suddenly stopped sealing
valve core
0.8
collar to shaft concentricity measured at 0.018mm TIR
collar
0.69
bearing seized after lubrication interval exceeded by 1000 hours
bearing
0.7
seal ring dynamic lip worn through from high-speed rotation
seal ring
0.56
flange surface pitting observed during scheduled maintenance
flange
0.59
customer reports self-seal works except in sub-zero temperatures
o-ring
0.58
bushing material transfer onto mating shaft surface visible
bushing
0.87
gasket material hardened and cracked after saltwater exposure exposure
gasket
0.93
dampener rebound rate 37% slower than specification requires
dampener
0.67
spring tangling in assembly, wrong wire diameter suspected
compression spring
0.8
dampener bottoming out during high-amplitude vibration test
dampener
0.92
seal ring cracked circumferentially at 3 o'clock position
seal ring
0.54
anti-rotation feature on locking mechanism sheared off
locking mechanism
0.73
alignment pin chamfer missing, damaging bore on installation
alignment pin
0.93
self-seal engages but releases prematurely under back-pressure
valve core
0.74
compression spring resonance detected at 45 Hz operating frequency
compression spring
0.65
alignment pin material appears softer than spec, deforms under normal load
alignment pin
0.81
locking mechanism pawl worn to 15% of original thickness
locking mechanism
0.94
thread assembly anti-seize coating missing from factory
thread assembly
0.66
torque limiter calibration drifted 58% over service interval
torque limiter
0.61
actuator diaphragm ruptured during pressure spike event
actuator
0.36
compression spring lost tension, measured at 65% of spec
compression spring
0.42
prevailing torque of thread lock feature decayed after 200 cycles
thread assembly
0.57
customer reports same vibration issue across multiple replacement units
dampener
0.64
valve core erosion visible after 800 hours with abrasive media
valve core
0.77
locking mechanism spring fractured, lock no longer holds
locking mechanism
0.84
flange weld HAZ shows micro-cracking under dye penetrant test
flange
0.72
customer reports same vibration issue across multiple replacement units
dampener
0.73
seal ring durometer reading 85A, spec is 70A, material hardened
seal ring
0.94
bushing squeaks during slow rotation, silent at operating speed
bushing
0.82
thread form profile out of spec per optical comparator check
thread assembly
0.89
coupling sleeve axial float exceeds 1.7mm allowable
coupling sleeve
0.91
thread assembly pitch diameter out of tolerance on CMM measurement
thread assembly
0.89
transmitted torque ripple of 19% measured at output shaft
torque limiter
0.85
bushing OD spinning in housing bore, lost interference fit
bushing
0.88
retention clip corrosion products contaminating seal area
retention clip
0.74
grinding noise at startup, disappears after 45 seconds
bushing
0.79
mechanism cycles 10 times before failing to lock, spec is 100000
locking mechanism
0.53
regulator relief valve weeping at 56% below rated crack pressure
pressure regulator
0.85
torque limiter clutch plates glazed from repeated slip events
torque limiter
0.75
seal ring shows uneven compression pattern on disassembly
seal ring
0.63
fretting debris visible at collar-to-shaft interface
collar
0.76
actuator coil resistance 40% above nominal, suspect overheating damage
actuator
0.58
dampener fluid level low, possible slow leak from housing
dampener
0.89
alignment pin material appears softer than spec, deforms under normal load
alignment pin
0.86
alignment pin material appears softer than spec, deforms under normal load
alignment pin
0.68
hairline crack found on stem shaft during ultrasonic inspection
stem shaft
0.71
pressure regulator output oscillates +/- 1.1 kPa at steady state
pressure regulator
0.87
pressure regulator diaphragm cracked during inspection
pressure regulator
0.55
retention clip corrosion products contaminating seal area
retention clip
0.7
pressure drop across regulator exceeds 1.8 kPa limit
pressure regulator
0.72