Dimensional chain
Pin diameter, bushing bore, body and axial clearance.
PAIR OF PIN-BUSHING
Coordination of pin-bushing pair
Related dimensions, working clearance, hardness and lubrication are considered together.
2 partssingle pairing
Gapby operating mode
Lubricationaccording to the movement of the node
PAIR OF PIN-BUSHING
Pin and bushing are not independently selectable
Nominal diameters, actual tolerances and operating clearance are considered along with temperature, contamination and maintenance method. A too general query for one part does not show the behavior of the entire mate.
WHAT TO CHECK
Balance of couple characteristics
Each zone has its own function and verification method.
Hardness
Working areas and core material properties.
Surface
Roughness, coating and processing marks.
Lubrication
Feed points, grooves and service intervals.
HOW THE WORK IS CONSTRUCTED
Joint inspection before sample production
The drawings of both parts are compared according to bases and landing zones. After this, a control set of dimensions is determined, which is checked on a sample and in a serial batch.
Comparison
Units, bases and conjugate dimensions.
Sample
Actual clearance and quality of working areas.
Series
Dimensional repeatability and kit identification.
RESULT
Complete delivery without mixing size groups
If necessary, pins, bushings and shims are marked as a matched set. The packaging format is determined by the order.
- CoupleRelated reference dimensions.
- KitWashers and additional elements.
- MarkingBatch traceability.
BEFORE AGREEMENT
The dimensional chain of a pair must be unambiguous
The nominal diameter does not indicate the actual working clearance. For a pair, the tolerances of the pin and bushing, the fit of the bushing in the body, the temperature and condition of the lubricant are recorded. Materials and hardness are selected together to evaluate the interface rather than two independent parts.
finger
Diameter, shape, fixation and working surface area.
Bushing
Inner size, outer fit, length and grooves.
Gap
Calculation based on maximum dimensions and operating conditions.
Acceptance
Separate measurements and checking the compatibility of the kit.
NEXT STEP
Send drawings of both mating parts
Add operating conditions, lubrication and expected delivery format.