Pawls & Ratchets Pitch 2.09~12.56

Quality Transmission is the largest North American supplier of off-the-shelf metric gearing.

Specifications
Catalog No.	SRT-C	SRTĄSRTB
Angle of jaw or teeth	60	60
Material	S45C (Carbon steel)	S45C (Carbon steel)
Heat treatment	Induction hardened teeth	Induction hardened teeth
Surface hardness	HRC4853	HRC4853
Surface treatment	Black oxide	Black oxide
Surface finish	Cut	Cut
Datum reference surface for teeth cutting	Bore	Bore

T4

T9

Pawls

Catalog No.	J	K	L	M	N	Shape	Weight(kgf)
SRT2/3-C [ DXF\|DWG \| 3D CAD] SRT1-C [ DXF\|DWG \| 3D CAD] SRT2-C [ DXF\|DWG \| 3D CAD] SRT3-C [ DXF\|DWG \| 3D CAD] SRT4-C [ DXF\|DWG \| 3D CAD]	5 8 10 12 13	8 10 12.5 15 18	38 49 67.5 80 98	30 39 55 65 80	6 12 15 20 25	T5 T5 T5 T5 T5	0.02 0.05 0.12 0.22 0.3

Ratchets

Catalog No.	Pitch	No. of teeth	Bore	Hub dia.	Outside dia.	Face width	Hub width	Total length	Depth of teeth	Mounting distance	Center distance	Shape	Allowable torque (kgf)	Allowable torque (N)	Weight (kgf)	Catalog No.
Catalog No.	P	z	A	B	C	D(F)	E	F	G	H	I	Shape	Bending strength	Bending strength	Weight (kgf)	Catalog No.
SRT2/3-50 [ DXF\|DWG \| 3D CAD] SRT2/3-60 [ DXF\|DWG \| 3D CAD] SRT2/3-80 [ DXF\|DWG \| 3D CAD] SRT2/3-90 [ DXF\|DWG \| 3D CAD] SRT2/3-100 [ DXF\|DWG \| 3D CAD]	2.09	50 60 80 90 100	10 10 12 12 12	-	33.3 40 53.3 60 66.6	6	-	6	1	15.5 19 25.5 29 32	33.8 35.5 39.4 41.7 43.9	T4	0.31 0.42 0.61 0.73 0.84	3.07 4.1 6 7.11 8.24	0.034 0.053 0.095 0.12 0.15	SRT2/3-50 SRT2/3-60 SRT2/3-80 SRT2/3-90 SRT2/3-100
SRT1-50 [ DXF\|DWG \| 3D CAD] SRT1-60 [ DXF\|DWG \| 3D CAD] SRT1-80 [ DXF\|DWG \| 3D CAD] SRT1-90 [ DXF\|DWG \| 3D CAD] SRT1-100 [ DXF\|DWG \| 3D CAD]	3.14	50 60 80 90 100	12 15 15 15 15	-	50 60 80 90 100	12	-	12	1.6	23.4 28.4 38.4 43.4 48.4	45.5 48.2 54.7 58.3 62.2	T4	1.5 1.99 3 3.52 4.02	14.69 19.5 29.37 34.47 39.4	0.16 0.24 0.44 0.56 0.7	SRT1-50 SRT1-60 SRT1-80 SRT1-90 SRT1-100
SRT2-30 [ DXF\|DWG \| 3D CAD] SRT2-40 [ DXF\|DWG \| 3D CAD] SRT2-50 [ DXF\|DWG \| 3D CAD] SRT2-60 [ DXF\|DWG \| 3D CAD]	6.28	30 40 50 60	15 15 15 15	-	60 80 100 120	15	-	15	3.1	26.9 36.9 46.9 56.9	61.2 66.2 72.3 79.1	T4	2.96 5.02 7.22 9.61	29.03 49.22 70.82 94.28	0.28 0.53 0.86 1.24	SRT2-30 SRT2-40 SRT2-50 SRT2-60
SRT3-30 [ DXF\|DWG \| 3D CAD] SRT3-40 [ DXF\|DWG \| 3D CAD] SRT3-50 [ DXF\|DWG \| 3D CAD]	9.42	30 40 50	15 20 20	-	90 120 150	20	-	20	5	40 55 70	76.3 85.1 95.5	T4	9.44 16.06 23.31	92.56 157.52 228.62	0.86 1.58 2.54	SRT3-30 SRT3-40 SRT3-50
SRT4-30 [ DXF\|DWG \| 3D CAD] SRT4-40 [ DXF\|DWG \| 3D CAD] SRT4-50 [ DXF\|DWG \| 3D CAD]	12.56	30 40 50	20 20 20	-	120 160 200	25	-	25	7.4	52.6 72.6 92.6	95.7 108 122.4	T4	23.04 39.27 57.04	225.92 385.14 559.4	1.91 3.54 5.68	SRT4-30 SRT4-40 SRT4-50

Ratchets with Hubs

Catalog No.	Pitch	No. of teeth	Bore	Hub dia.	Outside dia.	Face width	Hub width	Total length	Depth of teeth	Mounting distance	Center distance	Shape	Allowable torque (kgf)	Allowable torque (N)	Weight (kgf)	Catalog No.
Catalog No.	P	z	A	B	C	D(F)	E	F	G	H	I	Shape	Bending strength	Bending strength	Weight (kgf)	Catalog No.
SRTB2/3-50 [ DXF\|DWG \| 3D CAD] SRTB2/3-60 [ DXF\|DWG \| 3D CAD] SRTB2/3-80 [ DXF\|DWG \| 3D CAD] SRTB2/3-90 [ DXF\|DWG \| 3D CAD] SRTB2/3-100 [ DXF\|DWG \| 3D CAD]	2.09	50 60 80 90 100	10 10 12 12 12	25 30 35 40 40	33.3 40 53.3 60 66.6	6	10	16	1	15.5 19 25.5 29 32	33.8 35.5 39.4 41.7 43.9	T9	0.31 0.42 0.61 0.73 0.84	3.07 4.1 6 7.11 8.24	0.067 0.1 0.16 0.21 0.24	SRTB2/3-50 SRTB2/3-60 SRTB2/3-80 SRTB2/3-90 SRTB2/3-100
SRTB1-50 [ DXF\|DWG \| 3D CAD] SRTB1-60 [ DXF\|DWG \| 3D CAD] SRTB1-80 [ DXF\|DWG \| 3D CAD] SRTB1-90 [ DXF\|DWG \| 3D CAD] SRTB1-100 [ DXF\|DWG \| 3D CAD]	3.14	50 60 80 90 100	12 15 15 15 15	35 40 50 50 50	50 60 80 90 100	12	12	24	1.6	23.4 28.4 38.4 43.4 48.4	45.5 48.2 54.7 58.3 62.2	T9	1.5 1.99 3 3.52 4.02	14.69 19.5 29.37 34.47 39.4	0.24 0.34 0.61 0.73 0.87	SRTB1-50 SRTB1-60 SRTB1-80 SRTB1-90 SRTB1-100
SRTB2-30 [ DXF\|DWG \| 3D CAD] SRTB2-40 [ DXF\|DWG \| 3D CAD] SRTB2-50 [ DXF\|DWG \| 3D CAD] SRTB2-60 [ DXF\|DWG \| 3D CAD]	6.28	30 40 50 60	15 15 15 15	50 60 60 65	60 80 100 120	15	14	29	3.1	26.9 36.9 46.9 56.9	61.2 66.2 72.3 79.1	T9	2.96 5.02 7.22 9.61	29.03 49.22 70.82 94.28	0.48 0.82 1.14 1.59	SRTB2-30 SRTB2-40 SRTB2-50 SRTB2-60
SRTB3-30 [ DXF\|DWG \| 3D CAD] SRTB3-40 [ DXF\|DWG \| 3D CAD] SRTB3-50 [ DXF\|DWG \| 3D CAD]	9.42	30 40 50	15 20 20	75 80 85	90 120 150	20	16	36	5	40 55 70	76.3 85.1 95.5	T9	9.44 16.06 23.31	92.56 157.52 228.62	1.4 2.17 3.21	SRTB3-30 SRTB3-40 SRTB3-50
SRTB4-30 [ DXF\|DWG \| 3D CAD] SRTB4-40 [ DXF\|DWG \| 3D CAD] SRTB4-50 [ DXF\|DWG \| 3D CAD]	12.56	30 40 50	20 20 20	90 90 100	120 160 200	25	18	43	7.4	52.6 72.6 92.6	95.7 108 122.4	T9	23.04 39.27 57.04	225.92 385.14 559.4	2.76 4.4 6.74	SRTB4-30 SRTB4-40 SRTB4-50

Characteristics of Ratchets

These pawls and ratchets are induction hardened and therefore have superior durability.
Pawls for SRT(B) ratchets are to prevent reverse rotation. They are not suitable for use in driving ratchets or dividing rotation.
SRT2/3-C is made of SCM440 by lost wax casting method.
Please note the direction of teeth, viewing from the hub side. QTC can produce the opposite pointed teeth as a custom order.

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Quality Transmission Components
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Phone: 516-437-6700
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