TT (03) Wrap-around Type

In the event of an overload, the drive key disengages from the groove to disconnect the input and output, thereby protecting the equipment.Once the overload is removed, the connection is automatically reestablished at the same torque and indexing position. This type is used for wrap-around applications. Insert the shaft into the hub, and mount the pulley, gear, or other components onto the housing.

[Specifications]

TT Specifications

Model	Size	Rated Torque [N·m] (at 1500 min⁻¹)									Maximum Rotational Speed [^rpm]	Inertia Moment [kg·m²]	Mass [kg]


TT-1X-03	1X	0.2	0.5	1.0	1.5	2.0	2.5	3.0	3.5^*	4.0^*	1800	0.09 × 10^⁽⁻³⁾	0.4
TT-2-03	2	1	2	3	4	5	6	7	8^*	10^*	1800	0.31 × 10^⁽⁻³⁾	0.8
TT-2X-03	2X	2	3	5	8	10	12	15	18^*	20^*	1800	0.66 × 10^⁽⁻³⁾	1.1
TT-3-03	3	5	8	10	15	20	25	30	35^*	40^*	1800	1.59 × 10^⁽⁻³⁾	1.7
TT-3X-03	3X	10	16	20	30	40	50	60	70^*	80^*	1800	2.43 × 10^⁽⁻³⁾	3.0
TT-4X-03	4X	20	30	50	80	100	120	150	180^*	200^*	500	15.8 × 10^⁽⁻³⁾	6.5

The torque values listed in the table above are for a rotational speed of 1500 rpm.
The set torque value may vary by approximately ±20%.
* If durability is required at a specific torque level, please select a larger size.

[Dimensions]

三木プーリのTT巻き掛け用TT03モデル過負荷保護装置寸法図外形寸法および取付寸法を示す寸法図

Unit [mm]

Size	K1	B	D	E	F	H	N	L	P	S	T	U	M
1X	12.5	34.5	42	20	35	30	25	55	16	14	2.5	4	2-M4
2	16.5	38.5	55	25	40	40	30	65	20	18	3	5	2-M5
2X	20.5	40.5	65	25	45	45	31	70	20	18	3	5	2-M5
3	25.5	52.5	75	35	55	60	45	90	30	28	4	7	2-M6
3X	25.5	75	75	35	90	60	45	125	30	28	4	7	2-M6
4X	46	100	120	50	90	85	57	140	45	40	4.5	12	2-M8

O-ring keys (formerly JIS Type 2) and stop rings are included.

[Torque Coefficient]

Correction factor a to be considered when the shaft speed is 1500 min⁻¹ or less

You must select a model whose operating torque is close to the correction factor a for the operating shaft speed.

[Standard Hole Diameter φ K]

Unit [mm]

Model	Hole Specifications	Nominal Hole Diameter	Standard Hole Diameter A [mm]
Model	Hole Specifications	Nominal Hole Diameter	8	10	11	12	14	15	16	18	19	20	22	24	25	28	30	32	35	38	40	42	45
TT-1X-03	Compliant with JIS Old Standard E9	Unmarked	●	●	●	●
	Compliant with JIS Standard H9	H		●	●	●
	Compliant with motor standards	N
TT-2-03	Compliant with JIS Old Standard E9	Unmarked			●	●	●	●	●
	Compliant with JIS Standard H9	H			●	●	●	●	●
	Compliant with motor standards	N					●
TT-2X-03	Compliant with JIS Old Standard E9	Unmarked					●	●	●	●	●	●
	Compliant with JIS Standard H9	H					●	●	●	●	●
	Compliant with motor standards	N					●				●
TT-3-03	Compliant with JIS Old Standard E9	Unspecified								●	●	●	●	●	●
	Compliant with JIS Standard H9	H								●	●	●	●	●	●
	Compliant with motor standards	N									●			●
TT-3X-03	Compliant with JIS Old Standard E9	Unmarked								●	●	●	●	●	●
	Compliant with JIS Standard H9	H								●	●	●	●	●	●
	Compliant with motor standards	N									●			●
TT-4X-03	Compliant with JIS Old Standard E9	Unmarked									●	●	●	●	●	●	●	●	●	●	●	●	●
	Compliant with JIS Standard H9	H									●	●	●	●	●	●	●	●	●	●	●	●	●
	Compliant with motor standards	N									●			●		●				●		●

The 8mm-diameter hole does not have a keyway.

三木プーリのTT03モデル過負荷保護装置（TT巻き掛け用）ご注文時の型式構成説明図