For the tolerances you have not specifically marked, for different processing methods, Leanplans will carry out production and processing in accordance with the tolerances described in the following text.

一、CNC Machining

Table 1.1 Numerical values of limit deviations for linear dimensions （mm）（GB/T 1804-2000）

Tolerance Grade	Size Segmentation（mm）
	0.5～3	>3～6	>6～30	>30～120	>120～400	>400～1000	>1000～2000	>2000～4000
f	±0.05	±0.05	±0.10	±0.15	±0.20	±0.30	±0.50	—-
m	±0.10	±0.10	±0.20	±0.30	±0.50	±0.80	±1.20	±2.00
c	±0.20	±0.30	±0.50	±0.80	±1.20	±2.00	±3.00	±4.00
v	—-	±0.50	±1.00	±1.50	±2.50	±4.00	±6.00	±8.00

The limit deviation of angular dimensions is selected as grade M by default for implementation:

Table 1.2 Numerical values of limit deviations for angular dimensions （mm）（GB/T 1804-2000）

Tolerance Grade	Size Segmentation（mm）
	≤10	>10～50	>50～120	>120～400	>400
f	±1°	±30′	±20′	±10′	±5′
m	±1°	±30′	±20′	±10′	±5′
c	±1°30′	±1°	±30′	±15′	±10′
v	±3°	±2°	±1°	±30′	±20′
Note: The length of the angular dimension is determined based on the reference length of the angle (generally the length of the shorter side), and for the cone angle, it is determined based on the length of the generatrix of the cone.

The limit deviation of fillet radius and chamfer height dimensions is selected as grade M by default for implementation:

Table 1.3 Numerical values of limit deviations for fillet radius and chamfer height dimensions（mm）（GB/T 1804-2000）

Tolerance Grade	Size Segmentation（mm）
	0.5～3	>3～6	>6～30	>30
f	±0.20	±0.50	±1.00	±2.00
m	±0.20	±0.50	±1.00	±2.00
c	±0.40	±1.00	±2.00	±4.00
v	±0.40	±1.00	±2.00	±4.00

The standard tolerance of processing accuracy is selected as grade T12 by default:

Table 1.4 GB/T 1804-2000 IT4-TI18 Tolerance data

Basic size		Tolerance value
		IT4	IT5	IT6	IT7	IT8	IT9	IT10	IT11	IT12	IT13	IT14	IT15	IT16	IT17	IT18
＞	≤	μm								mm
–	3	3	4	6	10	14	25	40	60	0.10	0.14	0.25	0.40	0.60	1.0	1.4
3	6	4	5	8	12	18	30	48	75	0.12	0.18	0.30	0.48	0.75	1.2	1.8
6	10	4	6	9	15	22	36	58	90	0.15	0.22	0.36	0.58	0.90	1.5	2.2
10	18	5	8	11	18	27	43	70	110	0.18	0.27	0.43	0.70	1.10	1.8	2.7
18	30	6	9	13	21	33	52	84	130	0.21	0.33	0.52	0.84	1.30	2.1	3.3
30	50	7	11	16	25	39	62	100	160	0.25	0.39	0.62	1.00	1.60	2.5	3.9
50	80	8	13	19	30	46	74	120	190	0.30	0.46	0.74	1.20	1.90	3.0	4.6
80	120	10	15	22	35	54	87	140	220	0.35	0.54	0.87	1.40	2.20	3.5	5.4
120	180	12	18	25	40	63	100	160	250	0.40	0.63	1.00	1.60	2.50	4.0	6.3
180	250	14	20	29	46	72	115	185	290	0.46	0.72	1.15	1.85	2.90	4.6	7.2
250	315	16	23	32	52	81	130	210	320	0.52	0.81	1.30	2.10	3.20	5.2	8.1
315	400	18	25	36	57	89	140	230	360	0.57	0.89	1.40	2.30	3.60	5.7	8.9
400	500	20	27	40	63	97	155	250	400	0.63	0.97	1.55	2.50	4.00	6.3	9.7

The unnoted tolerance of straightness and flatness is selected as grade K by default for implementation:

Table 1.5 Unnoted tolerance values of straightness and flatness （mm）（GB/T1184-1996）

Tolerance Grade	The range of the basic length of straightness and flatness
	~10	>10~30	>30~100	>100~300	>300~1000	>1000~3000
H	0.02	0.05	0.1	0.2	0.3	0.1
K	0.05	0.1	0.2	0.4	0.6	0.8
L	0.1	0.2	0.4	0.8	1.2	1.6

The unnoted tolerance of perpendicularity is selected as grade K by default for implementation: 

Table 1.6 Unnoted tolerance values of perpendicularity（mm）（GB/T1184-1996）

Tolerance Grade	The range of the basic length of the short side for perpendicularity tolerance
	~100	>100~300	>300~1000	>1000~3000
H	0.2	0.3	0.4	0.5
K	0.4	0.6	0.8	1.0
L	0.5	1.0	1.5	2.0

The unnoted tolerance of circular runout is selected as grade K by default for implementation:

Table 1.7 Unnoted tolerance values of circular runout（mm）（GB/T1184-1996）

Tolerance Grade	Table 1.8 Unnoted Tolerance of Concentricity and Symmetry
H	0.1
K	0.2
L	0.3

The unnoted tolerance of concentricity and symmetry is implemented by default as per Table 1.8:

Table 1.8 Unnoted Tolerance of Concentricity and Symmetry（mm）(GB/T 1184-1996)

“Principal parameter” D、B、L	≤1	＞1~3	＞3~6	＞6~10	＞10~18	＞18~30	＞30~50	＞50~120	＞120~250
Tolerance value(H)	0.04	0.06	0.08	0.1	0.12	0.15	0.2	0.25	0.3
Principal parameter D、B、L	≤250~500	＞500~800	＞800~1250	＞1250~2000	＞2000~3150	＞3150~5000	＞5000~8000	＞8000~10000
Tolerance value(H)	0.4	0.5	0.6	0.8	1	1.2	1.5	2

The unnoted tolerance of symmetry of keyway is implemented by default as per Table 1.9:

Table 1.9 Unnoted Tolerance of Symmetry of Keyway（mm）(GB/T 1184-1996)

Width of keyway	＞1~3	＞3~6	＞6~10	＞10~18	＞18~30	＞30~50	＞50~120	＞120~250
Tolerance value	0.02	0.025	0.03	0.04	0.05	0.06	0.08	0.1

The unnoted positional tolerance of screw holes and through holes for bolts is implemented by default as per Table 1.10:

Table 1.10 Unnoted Positional Tolerance of Screw Holes and Through Holes for Bolts（mm）(GB/T 1184-1996)

Diameter of bolt	M4	M5	M6	M8	M10	M12	M16	M20	M24
Through-hole	0.5	0.5	0.6	1	1	1.5	1.5	2	2
Threaded hole	0.25	0.25	0.3	0.5	0.5	0.75	0.75	1	1
Diameter of bolt	M30	M36	M42	M48	M56	M64	M72	M80	M90
Through-hole	3	3	3	4	6	6	6	6	6
Threaded hole	1.5	1.5	1.5	2	3	3	3	3	3

If surface roughness is not specified, the default is to follow Table 1.11:

Table 1.11 Unnoted Surface roughness

Position	Surface roughness
Threaded through holes, long holes and holes with twist or drill points	Ra≤25μm
Retracting groove, lubricating groove, thread, thread retracting groove, wedge key and keyway	Ra≤3.2μm
Inner rounding (chamfering)	The fine surface attached to it is the same
Outer rounding (chamfering)	The rough surface attached to it is the same

No tolerances are noted for linear dimensions and shape positions of welded parts, and the default is to follow Table 1.12:

Tbale 1.12 Unnoted tolerances for linear dimensions and geometrical tolerances of welded components （mm）(JB/T 5000.3-1998)

Tolerance Grade	Size Segmentation
	＞30~120	＞120~400	＞400~1000	＞1000~2000	＞2000~4000	＞4000~8000	＞8000~12000	＞12000~16000
Dimensional deviation（B）	±2	±2	±3	±4	±5	±8	±10	±12
Form and position tolerance（F）	1	1.5	3	4.5	6	8	10	12

The unnoted tolerance of the angle of welded components is implemented by default as per Table 1.13: 

Table 1.13 Unnoted Tolerance of Angles of Welded Components（mm）(JB/T 5000.3-1998)

Tolerance Grade	Size Segmentation(Short side length)
	≤315	＞315~1000	＞1000	≤315	＞315~1000	＞1000
	Deviation			Deviation
B	±15′	±30′	±20′	±13	±9	±6

二、Sheet metal

Refer to international standards: ISO 2768, national standards: GB/T 1184-1996, GB/T 1804-2000. And the data provided by existing production suppliers (that is, the conventional accuracy that can be achieved by processing), formulate the unnoted tolerance standard for the processing accuracy of sheet metal parts, and stipulate the tolerance grade and limit deviation values of the general tolerance of the tolerance dimensions that are not noted.

Table 2.1 Limit deviation values of unnoted linear dimensions （mm）

Types	Segmentation of basic dimensions
	0~30	>30~120	>120~400	>400~1000	>1000~2000	>2000~4000
Bending	±0.2	±0.3	±0.5	±1.5	±3	±4
Weld	±0.5	±0.8	±1.2	±3	±5	±6

Note: All clearance dimensions are subject to positive tolerances; the external dimensions are subject to negative tolerances.

Table 2.2 Limit deviation values of unnoted fillet radius and chamfer height dimensions（mm）

Types	Segmentation of basic dimensions
	0.5~3	>3~6	>6~30	>30
Bending	±0.4	±1	±2	±4
Weld	±0.6	±1.5	±3.5	±6

Note: All hole dimensions are subject to positive tolerances.

Table 2.3 Limit deviation values of unnoted angular dimensions（mm）

Types	Segmentation of basic dimensions
	0~10	>10~50	>50~120	>120~400	>400
Bending	±1º30ˊ	±1º	±1º	±30ˊ	±20ˊ
Weld	±3º	±2º	±1º	±30ˊ	±20ˊ

Table 2.4 Limit deviation values of unnoted center distance dimensions of holes（mm）

Types	Segmentation of basic dimensions
	0~50	>50~100	>100~200	>200~400	>400~1000	>1000
Bending	±0.3	±0.3	±0.4	±0.4	±0.5	±1
Weld	±0.5	±0.6	±0.7	±0.8	±0.9	±1.2

Table 2.5 Unnoted Tolerance Values of Straightness and Flatness（mm）

Types	Segmentation of basic dimensions
	0~100	>100~500	>500~1000	>1000~2000	>2000~3000	>3000
Bending	±0.2	±0.5	±2	±3	±4	±5
Weld	±0.2	±0.5	±3	±5	±6	±8

Table 2.6 Unnoted Tolerance Values of Parallelism（mm）

Types	Segmentation of basic dimensions
	0~100	>100~250	>250~400	>400~1000	>1000~2000	>2000
Bending	±0.4	±0.6	±0.8	±1	±2	±3
Weld	±0.6	±1	±1.5	±3	±4	±5

Table 2.7 Tolerance Requirements for Basic Material Thickness（mm）

Nominal thickness	Allowable thickness deviation
	general precisionPT.A			high precisionPT.B
	Nominal width			≤1199
	≤1200	>1200~1500	>1500	≤1200	>1200~1500	>1500
≤0.4	±0.04	±0.05	±0.06	±0.025	±0.035	±0.045
>0.4~0.6	±0.05	±0.06	±0.07	±0.035	±0.045	±0.05
>0.6~0.8	±0.06	±0.07	±0.08	±0.040	±0.050	±0.05
>0.8~1.0	±0.07	±0.08	±0.09	±0.045	±0.060	±0.06
>1.0~1.2	±0.08	±0.09	±0.10	±0.055	±0.070	±0.07
>1.2~1.6	±0.10	±0.11	±0.11	±0.070	±0.080	±0.08
>1.6~2.0	±0.12	±0.13	±0.13	±0.080	±0.090	±0.09
>2.0~2.5	±0.14	±0.15	±0.15	±0.10	±0.11	±0.11
>2.5~3.0	±0.16	±0.17	±0.17	±0.11	±0.12	±0.12
>3.0~4.0	±0.17	±0.19	±0.19	±0.14	±0.15	±0.15

Table 2.8 Tolerance of Angle Steel （mm）

Angle steel number	Side width b/mm	Side thicknessd/mm	Length/m
2~5.6	±0.8	±0.4	4~12
6.3~9	±1.2	±0.6	4~12
10~14	±1.8	±0.7	4~19
16~20	±2.5	±1.0	6~19

Table 2.9 Tolerance of Square Tube Materials （mm）

Category	Tolerance
Thickness of square pipe material	≤±0.3mm

三、 3D Printing

3D printing is implemented by default as per Table 4.1:

Table 3.1 Dimensions and Tolerances of 3D Printing （mm）

Materials	Minimum detail	Minimum thickness	Highest precision
Imported resin	0.3mm	0.8mm	0.1mm
Translucent photosensitive resin	0.3mm	0.8mm	0.2mm
Transparent photosensitive resin	0.3mm	0.8mm	0.2mm
Nylon	0.3mm	0.6mm	0.1mm
Nylon + glass fiber	0.3mm	0.6mm	0.1mm