Why is slot-width tolerance set to ±0.32 mm across 5 slots?

Answer: Slot width sets the lateral boundary for the foam dividers, so a tight slot jams and a loose one leaves play, both enlarging displacement after a drop. Radio comms test equipment hard case logs ±0.32 mm together with the 10 mm frame height, and neither figure alone settles the limit.

At which node is ≤0.28 mm frame sink rechecked?

Answer: The rig runs 4200 cycles, frame height is read before and after, and the difference is the sink, rechecked at 10 kg loaded. A sink past the line eats the 10 mm travel and the ≤0.55 mm displacement cannot hold.

How is ≤11% hinge torque decay measured?

Answer: A 3.0 N·m starting torque is re-read every 2100 cycles, and at 4200 the initial-to-final difference over the initial value is written as ≤11%. Decay and frame sink go into the same batch record.

What happens when displacement crosses the line after a 1.0 m drop?

Answer: Six faces are dropped once each, an optical reader takes the 5 slot offsets and the worst face is compared with ≤0.55 mm. A crossing triggers a full recheck back to the slot deviation table, not a re-milled slot on one shell.

Radio comms test equipment hard case

Quick answer: Radio comms test equipment hard case holds slot displacement to 0.55 mm after a 1.0 m drop by pairing slot-width tolerance with a 10 mm lid frame.

Slot-width tolerance of the Radio comms test equipment hard case
Hold-down frame height inside the lid
Slot displacement readings after a drop
Hinge torque decay on the cycle rig
Slot-width rejection limit for comms batches
FAQ

1. Slot-width tolerance of the Radio comms test equipment hard case

Radio comms test equipment hard case is milled with 5 locating slots, and a ±0.32 mm width tolerance starts the size chain. The slots carry no load; they bound the foam dividers laterally, so a width outside tolerance shifts where the press frame lands. The JUNZHIJIA log at Kexin New Materials (Guangdong) Co., Ltd. labels S1 to S5 and measures each at 23°C with a calliper to 0.01 mm. A 545×390×220 mm outer size, 480×330×155 mm cavity and 4.0 mm wall fix the shell first. The largest-minus-smallest width across the 5 slots must sit inside ±0.32 mm before fitting. What is measured is post-drop wandering, not a neat single unit.

Slot-width tolerance and frame height are used as a pair. A 10 mm frame height sets how deep the lid foam presses into the slot mouth; a tight slot jams the divider, a loose one leaves lateral play, and the two together decide slot displacement after a drop. Radio comms test equipment hard case does not release the two on separate sheets; they share one row in the log.

Slot ID	Width deviation	Verdict
S1	+0.08 mm	Pass
S2	−0.12 mm	Pass
S3	+0.15 mm	Pass

If all 5 slots lean one way the dividers shift together, while alternating signs cancel part of the shift, so Radio comms test equipment hard case keeps that deviation table for recheck.

2. Hold-down frame height inside the lid

A 10 mm hold-down frame height is the closed gap from frame edge to rim plane, bounding how far foam enters the slot mouth. Too high passes impact into the dividers, too low leaves vertical play. Radio comms test equipment hard case gauges the gap at four corners with a feeler gauge and reads it beside the 5 slot deviations.

Radio comms test equipment hard case navy open shell on steel bench, smooth dark lid foam, kraft packs and boxed parts, twin catches

The fit between frame and base slots ends up in the ≤0.28 mm frame-sink recheck line. If the frame sinks past that after 4200 cycles, the original 10 mm travel is eaten and the ≤0.55 mm slot displacement cannot hold. An inspector measures frame height before and after the rig cycles and files the difference under that batch.

At 5.0 kg empty and 10 kg loaded the frame sees different rebound loads, so the limit height is rechecked in the loaded state rather than on an empty shell alone.

3. Slot displacement readings after a drop

A ≤0.55 mm displacement after a 1.0 m drop is the bluntest criterion for Radio comms test equipment hard case. The rig drops six faces, and an optical reader takes the 5 slot centre-line offsets against the pre-drop position; the largest offset is the unit displacement compared with ≤0.55 mm. The reading is the worst face, not an average.

An over-line reading usually starts at the loosest slots. If S2 carries a negative width deviation and the frame has worn low, lateral play opens all at once on impact. Radio comms test equipment hard case answers an over-line with a full-batch recheck, not by re-milling one slot on a single shell.

Frame sink and torque decay are reviewed in the same recheck pass, and all three readings share one batch code so a size fault and a life fault are not filed apart.

4. Hinge torque decay on the cycle rig

A 3.0 N·m hinge torque is the hold-open start for this Radio comms test equipment hard case, and ≤11% decay keeps the lid at its set angle after 4200 cycles. Static torque is read every 2100 cycles, and the initial-to-final gap over the start is the decay percentage. Two latches at 350 N each log force on the same rig.

Radio comms test equipment hard case navy closed shell on steel shelf, rounded lid ribs, straight seam, two side latches and corner guards

Torque decay and frame sink are two quantities read from the same cycle run. A loose hinge tips the closed lid, the frame then loads unevenly, and the sink reading rises before slot displacement does. Keeping both side by side in the record tells a recheck whether the degradation came from the hinge or the frame.

Torque band	Recheck node	Decay
T1	0 cycles	0%
T2	2100 cycles	5%
T3	4200 cycles	10%

Staying inside ≤11% at 4200 cycles says hinge holding force did not pull the 10 mm frame travel off line. A decay near the ceiling sends the whole batch to recheck, back to its slot deviation table and frame-height record.

5. Slot-width rejection limit for comms batches

The comms-batch slot rejection still uses ±0.32 mm, but it governs a whole batch rather than one shell. Batches group by one tool and one foam lot, coded on a non-cosmetic base face with the 5 deviations, frame height, hinge start and seal result. A 1.0 m drop and IP66 recheck are finished-product checks that do not replace it.

When a batch crosses the width line, every shell under that batch is quarantined and the S1-to-S5 machining record is pulled, rather than only the loose slots being picked out. With the rejection at the end, the deviation table, frame height, displacement readings and torque decay in front of it form one traceable size chain.

Displacement band	Drop face	Disposition
≤0.30 mm	Base down	Release
0.31 to 0.50 mm	Lid down	Release
0.51 to 0.55 mm	Long side	Tag slot
Over 0.55 mm	Short side	Full recheck

Displacement is filed under the worst face; a unit near the ceiling, though inside the line, is still checked back to slot deviation and torque band to rule out a continuous drift from one slot. Radio comms test equipment hard case signs no release sheet unless all three readings are present.

Conclusion

Radio comms test equipment hard case splits post-drop slot control into three measurable figures: ≤0.55 mm displacement after a 1.0 m drop, ≤0.28 mm frame sink after 4200 cycles, and ≤11% hinge torque decay. They map to the ±0.32 mm tolerance of 5 slots, a 10 mm frame height and a 3.0 N·m hinge start, and missing one leaves divider wandering unexplained. The deviation table and torque band in a recheck record tell more about a batch than a single finished shell, and JUNZHIJIA keeps that size chain auditable.