Sprockets Nominal No.40

■ Sprockets is a solid or spoked gear that engages with a roller chain to transfer motion or power.
 Application of Sprockets: It is widely used in mechanical transmission in chemical industry, textile machinery, food processing, instrumentation,and petroleum
■ Only Sprockets and chains of the same specifications can be used in combination.
 This series is ISO 08A/ANSI 40 sprocket, and can be used in combination with MISUMI 40B series chain.
■ Do not use it with ISO/ANSI 08B series chain, which may cause the chain sprocket mechanism to fail to function properly!
■ Due to process reasons, it is impossible to guarantee the coincidence of the tooth tops of multiple Sprockets. If you need to use the tooth tops in an overlapping manner, please contact us.

■Sprockets chain drive has the following features compared with gear drive and belt drive:
1. Multi-tooth load bearing, safe and reliable;
2. Flexible transmission, absorbing shock and vibration;
3. Large center distance range, low manufacturing and mounting accuracy requirements;
4. Compared with belt drive, the transmission ratio is accurate and the transmission efficiency is higher, suitable for high temperature，dusty and humid environments.

■ Sprockets, chain selection
 Misumi’s sprocket and Sprockets product selection supports the principle of “Nominal Numbering”

Product Drawings of Sprockets (Unit: mm)

 Fixing Screw of Symbol ＊ is M6.
Symbol indicates that there is a notch on the outer diameter of the hub.
■ A single of Sprockets package label may not match the ordered model. It is a factory-managed model. Please note that the outer package label shall prevail!

■ Shaft Hole Machining Size Table

Sprockets Type	Sprockets Material	Surface Treatment	Accessories
C-SPA40B	Equivalent to S45C (Induction Hardened Teeth Tip)	-	Fixing Screw (Only Shaft Hole Specifications N)

	Part Number (Sprockets Type· No. of Teeth)	－	Specifications	－	Shaft Hole Diameter
Sprockets	C-SPA40B20	－	N	－	20

Part Number				Shaft Hole Specification	Shaft Hole Dia.(D)											Dp	DO	H	GD	L	ℓ
Type	Sprocket Nominal Model	Hub Type	Number of Teeth (T)		S Specification(H8)	N Specification(H7)
C－SPA	40	B	9	S N	9	12										37.13	42	28	23	22	5
			10			12	15									41.1	46	32	27
			11		10											45.08	51	36	31
			12			12	15									49.07	55	40	35
			13		12	12					20					53.07	59	37	－		6
			14			12	15			18	20	22	25			57.07	63	42
			15				15		17		20	22	25			61.08	67	46
			16		13											65.1	71	50
			17													69.12	76	54
			18													73.14	80	57
			19		14											77.16	84	62
			20				15				20		25		30	81.18	88	67		25	7
			22													89.24	96	75
			24													97.3	104	63
			25													101.33	108
			26													105.36	112
			30													121.5	128

■ Sprockets, Shaft Hole Machining Size Table

Shart Hole Dia. D	Keyway b2×t2	Fixing Screw M
10·12	4×1.8	5
14～17	5×2.3	6
18～22	6×2.8	6
24～30	8×3.3	8
32·35	10×3.3	8
40	12×3.3	8

■ Sprockets maintenance
1. Sprockets tightness should be suitable. If it is too tight, it will increase power consumption, and bearing is easy to wear; if it is too loose, the sprocket is easy to runout and fall off the chain.
 The degree of tightness of the sprocket is: if lifted up or pressed down from the middle of the sprocket, the center distance between the two sprocket is about 2%-3%.

2. The Sprockets shall be installed on shaft without swing and skew.
 The end faces of the two Sprockets in the same transmission assembly should be in the same plane. When the center distance of the sprocket is less than 0.5 meters, the deviation can be 1 mm.
   When the center distance of the sprocket is more than 0.5 meters, the deviation can be 2 mm. But there shall be no friction on sprocket tooth side. Integral offset.
 If the offset is too large, chain is prone to fall off and wear is likely to accelerate. When replacing the sprocket, you must pay attention to check and adjust the offset

3. After the Sprockets is severely worn, the new sprocket and the new chain should be replaced at the same time to ensure good meshing.
 You cannot replace new Sprockets separately. Otherwise, it will cause bad engagement and accelerate the wear of new Sprockets.
 If the tooth surface of the sprocket is worn to a certain degree, it should be turned over in time (the sprocket used with adjustable surface) to extend the life time.

4. If the new Sprockets is too long or elongated after use, and difficult to adjust, the links can be removed by the case, but the number of the links must be even.
 The link should pass through the back of the sprocket with the lock piece being inserted outside, and the opening of the lock piece should be in the opposite direction of the turning.

5. Lubricating oil should be timely filled when Sprockets are working. Lubricating oil must enter the matching clearance between the roller and the inner sleeve to improve working conditions and reduce wear.

6. The old Sprockets cannot be mixed with some of the new sprocket, and should be replaced as a complete set, otherwise it is easy to produce impact in the transmission. Separate replacement of Sprockets will increase wear.