USD Front Fork, Piggyback Shock Absorber, Steering Damper Factory China

Operating standards of front shock absorbers
NO.	Process Name	Main Contents	Remark
1	Clean	1. The front fork tube combination, positioning tube, buffer spring, and damping spring are cleaned with unused clean kerosene. The inner hole of the front fork tube must be brushed with a brush. Requirements: No particulate matter or black oil stains.
2	Aluminum tube appearance selection	Select all:
		1. No obvious sags, leaks, scratches, orange peels, or bubbles in the appearance of the paint;
		2. Particles on the main view below Φ0.2mm, more than 240mm apart, 3 points are allowed;
		3. Trach, pores, and polishing lines Not allowed to appear.
3	Fork tube appearance selection	Select all:
		1. During the maximum stroke of the shock absorber, the exposed part of the fork tube (including the oil seal fitting section) must be free of scratches and chrome defects such as pinholes, blisters, and particles. Slight abrasions are allowed. There is a card issue phenomenon);
		2. The rest of the shock absorber fork pipe (excluding the oil seal matching section) is allowed to have bumps and abrasions and plating defects, but there must be no protrusion;
		3. The outer surface of the threaded end of the fork pipe is not allowed There are nodules and ablation after plating.
4	Scouring	1. Wash the aluminum cylinder and vacuum it with a straw. Requirement: No obvious particulate matter.
5	Tail hole bolt inspection	1. Each batch draws 20 sticks to test the torque, requiring 15-25N.m
6	Tightness check	1.100% test leak.
7	Oil check	1. Before mass production, the amount of oil must be corrected with a measuring cup.
8	Indicator	1.100% indicator check.
9	End cap inspection	1. Check whether the end cover is rounded;
9	End cap inspection	2. Check whether the retaining ring is locked in place.
10	Inspector general and appearance	1. 100% inspection of total length and shaft hole;
10	Inspector general and appearance	2. 100% inspection of appearance according to the second standard
11	Run-in	1.100% running-in, check for oil leakage.
12	Resting	1. Stand for 12h and check for oil leakage.
13	Boxing	1. Verify that the gimmicks are consistent with the real thing.

Operating standards of rear shock absorber
NO.	Process Name	Main Contents	Remark
1	Piston rod inspection	Select all:
		1. During the maximum stroke of the shock absorber, the exposed part of the piston rod (including the oil seal fitting section) must be free from scratches and chrome defects such as pinholes, blisters, and particles. Slight abrasions are allowed. There is a card issue phenomenon);
		2. The rest of the shock absorber piston rod (excluding the oil seal matching section) is allowed to have bumps and abrasions and plating defects, but there must be no protrusions.
2	Piston rod assembly inspection	1. 100% inspection of torque of connecting rod nut ¢ 10 or more;
		2. Inspection of piston runout 2%, runout requirement ≤ 0.1mm.
3	Clean	1. The cylinder, piston rod combination, buffer spring, and guide seat equipped with Q-ring are cleaned with clean kerosene, and the inner hole of the cylinder is cleaned with a brush. Requirements: There should be no obvious particulate matter and black oil stains.
		2. Drain the cleaning parts before assembly
4	Oil check	1. Before mass production, the amount of oil must be corrected with a measuring cup.
5	Damper indicator	1.100% indicator check.
6	Visual inspection before going online	1. 100% full inspection of dust cover, damper and spring before going online. No obvious scratches, bottom leakage or sand marks are required.
		2. The exposed end of the smooth surface of the damper piston rod is not allowed to be corroded by plating.
7	Overall length and visual inspection	1. 100% inspection of total length and shaft hole;
		2. 100% inspection of appearance according to item 4 requirements.
		3. Check the concentricity of the dustproof upper and lower covers for 100%.
8	Resting	1. Stand for 12h and check for oil leakage.
9	Boxing	1. Verify that the gimmicks are consistent with the real thing.