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The product covers entire performance series from N, M, H, SH, UH, EH to TH. Magnet can be customized with all the sizes and performance grade.

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The product covers entire performance series from N, M, H, SH, UH, EH to TH. Magnet can be customized with all the sizes and performance grade.

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Monte-Bianco Magnets Size Range and Inspection Standard

Table 1：General appearance inspection standards for block blanks

Schematic diagram of the block blank		Size range (unit: mm)
		L: perpendicular to the pressing direction B: pressing direction H: magnetization direction
		30≤L≤40 17≤B≤20 17≤H≤20	40≤L≤60 20≤B≤40 20≤H≤30	60≤L≤90 40≤B≤60 30≤H≤50	90≤L≤150 60≤B≤80 50≤H≤70
Defect Category	Schematic diagram	Defect limit conditions
Plane gap		L1≤1.2 B1≤1 H1≤1	L1≤1.5 B1≤1.2 H1≤1	L1≤1.7 B1≤1.5 H1≤1.2	L1≤2 B1≤1.6 H1≤1.5
Impurities		D1≤0.3	D1≤0.5	D1≤1	D1≤1.5
Internal crack		Internal cracks are judged as unqualified

Table 2： General appearance inspection standards for ring blanks

Schematic diagram of the shape of the ring blank		Size range (unit: mm)
		D: outer diameter of the ring d: inner diameter of the ring H: thickness (usually in the direction of magnetization)
		60≤D≤80 20≤d≤40 20 ≤H ≤40	80≤D≤100 40≤d≤60 20≤H≤40	100≤D≤120 60≤d≤80 20≤H≤40	120≤D≤140 80≤d≤100 20≤H≤40
Defect Category	Schematic diagram	Defect limit conditions
Outer arc missing corner		L1≤1.2 B1≤1 H1≤1	L1≤1.5 B1≤1.2 H1≤1	L1≤1.7 B1≤1.5 H1≤1	L1≤2 B1≤1.6 H1≤1
Impurities		D1≤0.5	D1≤0.8	D1≤1	D1≤1.5
Inner arc missing corner		L1≤1.2 B1≤1 H1≤1	L1≤1.5 B1≤1.2 H1≤1	L1≤1.7 B1≤1.5 H1≤1	L1≤2 B1≤1.6 H1≤1
Internal crack		Internal cracks are judged as unqualified

Table 3： General appearance inspection standards for cylindrical blanks

Schematic diagram of cylindrical blank shape		Size range (unit: mm)
		D: outer diameter of cylinder H: thickness (usually in the direction of magnetization)
		10≤D≤20 10 ≤H ≤20	20≤D≤40 20≤H≤40	40≤D≤60 20≤H≤40	60≤D≤80 20≤H≤40
Defect Category	Schematic diagram	Defect limit conditions
Missing corner		L1≤1 B1≤1 H1≤0.8	L1≤1.2 B1≤1.2 H1≤1	L1≤1.5 B1≤1.2 H1≤1	L1≤1.8 B1≤1.5 H1≤1
Impurities		D1≤0.3	D1≤0.5	D1≤0.8	D1≤1.2
Internal crack		Internal cracks are judged as unqualified

Table 4： General appearance inspection standards for tile blanks

Schematic diagram of the appearance of the tile blank		Size range (unit: mm)
		L: length B: width D: thickness H: arch height (D and H are generally the magnetization direction)
		20≤L≤40 20≤B≤40 20≤H≤40	40≤L≤60 20≤B≤40 20≤H≤40	60≤L≤80 30≤B≤50 30≤H≤50	60≤L≤80 40≤B≤60 30≤H≤50
Defect Category	Schematic diagram	Defect limit conditions
Missing corner		L1≤1 B1≤1 H1≤1	L1≤1.2 B1≤1 H1≤1	L1≤1.5 B1≤1.2 H1≤1	L1≤1.5 B1≤1.2 H1≤1.2
Impurities		D1≤0.3	D1≤0.5	D1≤0.8	D1≤1.2
Internal crack		Internal cracks are judged as unqualified

Notes:

1. The above is the company's general qualification judgment standard for rough products. When this standard cannot meet customer requirements, it will be implemented according to customer standards (when customers have special requirements, they will be resolved through negotiation between the two parties.)

2. The name of the conventional appearance defect refers to "missing corners". If it is difficult to judge by visual inspection, it can be measured by caliper or projection to quantify the judgment in mm, or it can be judged by the missing corner volume/corresponding specification volume mm3 < 2%. After full communication with the customer, if the missing corner does not affect the magnetic flux, the magnetic flux can be used for the final judgment;

3. In addition to the above 4 common specifications, such as trapezoidal (converted by square), special-shaped products, etc., judge according to the close specifications;

Special Size

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