Timing Pulleys - MXL Type

Brand :

MISUMI

Caution

Please note that the swaged flange options, NFC, RFC, and LFC, are not reflected in the CAD data.
Please check the content on our website as the PDF does not contain the most up-to-date information.

Product Description

[Material]
· Pulley: Aluminum alloy, S45C equivalent, SUS304
· Flange: Aluminum alloy, SPCC, SUS304
[Surface treatment]
· Clear anodize, black anodize, hard clear anodize (firm hardness 300HV~), electroless nickel plating, black iron oxide coating

■MXL

● Pulley Shape

Tooth Profile (ISO Standard Rack Dimensions)

Shape K

Shape A

Shape B

( ): 23 or Less Toothed Pulley

[ ! ]

Tooth groove dimensions slightly vary according to the number of teeth. (Pitch: 2.032mm)

[ ! ] The tolerance of the tap position dimension from the boss end face and pulley end face is ±0.3.
[ ! ] Shaft Bore Specs. H (Round hole), V or F (Stepped Hole), Y (Both Sides Stepped Hole) and WB (Two-stepped Hole) do not have tapped holes.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.

● Shaft Bore Specification
Select shaft bore spec mark and each dim. from the table below.

[ ! ] Surface treatment may not be applied to the shaft bores.

H Round Hole

P Round Hole + Tap

N New JIS Keyway + Tap

C Old JIS Keyway + Tap

[ ! ] Not applicable to Shape A

[ ! ] Specify NK10 when selecting the shaft bore dia. 10
and the keyway width 4.0 mm.
[NG] Shape A has keywayed bores only, not tapped holes.

V Stepped Hole

F Stepped Hole

Y Both Ends Stepped Hole

WB Two-stepped Hole

[ NG ] Not applicable to Shape K
[ ! ] Z-V(d) ≥ 2
[ ! ] 2.0 ≤ J ≤ W-2.0

[ ! ] Applicable to Shape B only
[ ! ] Z-F(d) ≥ 2
[ ! ] 2.0 ≤ J ≤ L-2.0

[ ! ] Applicable to Shape A only
[ ! ] Q-Y(d) ≥ 2
[ ! ] R-Y(d) ≥ 2
[ ! ] S+T ≤ W-3.0
[ ! ] S (T) ≥ 3.0

[ ! ] Applicable to Shape A only
[ ! ] Q-R ≥ 2
[ ! ] R-WB(d) ≥ 2
[ ! ] S+T ≤ W-3.0
[ ! ] S (T) ≥ 3.0

■Belt Nominal Width / Dimensions

mm	Nominal
mm	MXL013	MXL019	MXL025	MXL037	MXL050
A	4.5	6.0	7.5	11.0	14.0
W	8.5	10.0	11.5	15.0	18.0
L	14.0	16.5	18.0	22.0	25.0

■Tapped Hole Dimensions
(Shaft Bore Specs.: P, N, C)

d_H7 Shaft Bore I.D.	M (Coarse)	Accessory Set Screws
3 to 5	M3	M3 × 3
6 to 18	M4	M4 × 3
19 to 22	M5	M5 × 4

* In the case of pulley shape B and belt width of 0.13 inches,
the tap size is M4 even if the shaft bore diameter is 19-22.

Dimension Tolerance Without Command

Dimension Range		Tolerance (mm)
Over	or less	Tolerance (mm)
0.5	3	±0.1
3	6	±0.1
6	30	±0.2
30	120	±0.3

[ ! ] Compliant with JIS B 0405
Class m (Medium Class)

■Keyway Dimensions

d dim. Tolerance (H7)

Nominal (N,C)	d_H7
8 to 10(K)	＋0.015 0
11 to 18	＋0.018 0
19 to 30	＋0.021 0
31 to 50	＋0.025 0
51 to 70	＋0.030 0

New JIS Keyway Dimension Tolerance

Nominal (N)	b_JS9		t
8 to 10	3	±0.0125	1.4	＋0.1 0
10K to 12	4	±0.0150	1.8
13 to 17	5		2.3
18 to 22	6		2.8
23 to 30	8	±0.0180	3.3	＋0.2 0
31 to 38	10	±0.0180
39 to 44	12	±0.0215
45 to 50	14		3.8
55	16		4.3

Old JIS Keyway Dimension Tolerance

Nominal (C)	b_JS9		t
10 to 12	4	＋0.022 ＋0.010	1.5	＋0.1 0
15 to 20	5		2

Type	Belt Width					[ M ] Material		[ S ] Surface Treatment	[ A ] Accessory Set Screws
	3.2 mm (1/8 in)	4.8 mm (3/16 in)	6.4 mm (1/4 in)	9.5 mm (3/8 in)	12.7 mm (1/2 in)	Pulley	Flange
	MXL013	MXL019	MXL025	MXL037	MXL050	Pulley	Flange
ATP	●	●	●	●	●	Aluminum alloy	Aluminum alloy	Clear Anodize	SUS304
BTP	●	●	●	●	●			Black Anodize
KTP	●	●	●	●	●			Hard Clear Anodize
NTP	●	●	●	●	●			Electroless nickel plating
MTP	-	-	●	●	-	S45C Equivalent	SPCC	-	SCM435 (Black Oxide)
MTPB	-	-	●	●	-			Black Oxide Coating
MTPP	-	-	●	●	-			Electroless nickel plating
STP	●	●	●	●	●	SUS304	SUS304	-	SUS304

[ ! ] Flange is already swaged, and set screws are included for Shaft Bores P, N and C.
[ ! ] Due to vibrations during transportation, the set screw may become detached from the main body.