Metric Worms, Plastic Worm Gears Module 2~3

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

Specifications
Catalog No.	SUW	PG
Precision grade	KHK W 001 grade 4	KHK W 002 grade 5
Reference section of gear	Normal plane	Normal plane
Gear teeth	JIS 3 type Standard full depth	Standard full depth
Normal pressure angle	20 and 1430'	20 and 1430'
Material	SUS303 (Stainless steel)	MC901 (Nylon)
Heat treatment	-	-
Surface hardness	less than HB187	-
Surface treatment	-	-
Surface finish	Cut	Cut
Datum reference surface for gear cutting	Bore	Bore


W1	H1

Module 2 Worms(Pressure Angle1430')

Catalog No.	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Screw		Shape	Weight (kgf)
Catalog No.	Number of start	Hand of thread	L_H7	M	N	O	P	Q	Q'	R	Size	S	Shape	Weight (kgf)
SUW2-R1 [ DXF \| DWG \| 3D CAD] SUW2-R2 [ DXF \| DWG \| 3D CAD]	1 2	R R	12 12	25 25	31 31	35 35	32 32	14 14	- -	46 46	- -	- -	W1 W1	0.2 0.2

Lead Angle R1 3

42' R2 7

25'

Module 2 Worm Gears

Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Throat dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Web thickness	Web O.D.	Mounting distance	Shape	Allowable torque (kgfm)	Allowable torque (Nm)	Backlash (mm)	Weight (kgf)	Catalog No.
Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	A_H7	B	C	D	D'	E	F	F'	G	H	I	J	Shape	Surface durability	Surface durability	Backlash (mm)	Weight (kgf)	Catalog No.
PG2-20R1 [ DXF\|DWG \| 3D CAD] PG2-20R2 [ DXF\|DWG \| 3D CAD]	1/20 1/10	20 20	-0.021 -0.084	1 2	R R	10 10	33 33	40.08 40.34	44 44	46 46	22 22	13 13	- -	35 35	- -	- -	35.5 35.5	H1 H1	0.49 0.49	4.78 4.82	0.140.24 0.140.24	0.04 0.04	PG2-20R1 PG2-20R2

Module 2.5 Worms(Pressure Angle20)

Catalog No.	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Screw		Shape	Weight (kgf)
Catalog No.	Number of start	Hand of thread	L_H7	M	N	O	P	Q	Q'	R	Size	S	Shape	Weight (kgf)
SUW2.5-R1 [ DXF DWG \| 3D CAD] SUW2.5-R2 [ DXF DWG \| 3D CAD]	1 2	R R	15 15	30 30	37 37	42 42	45 45	18 18	- -	63 63	- -	- -	W1 W1	0.4 0.4

Lead Angle R1 3

52' R2 7

46'

Module 2.5 Worm Gears

Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Throat dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Web thickness	Web O.D.	Mounting distance	Shape	Allowable torque (kgfm)	Allowable torque (Nm)	Backlash (mm)	Weight (kgf)	Catalog No.
Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	A_H7	B	C	D	D'	E	F	F'	G	H	I	J	Shape	Surface durability	Surface durability	Backlash (mm)	Weight (kgf)	Catalog No.
PG2.5-20R1 [ DXF\|DWG \| 3D CAD] PG2.5-20R2 [ DXF\|DWG \| 3D CAD]	1/20 1/10	20 20	-0.023 -0.093	1 2	R R	12 12	35 35	50.11 50.46	55 55	57.5 57.5	22 22	14 14	- -	36 36	- -	- -	43.5 43.5	H1 H1	0.86 0.87	8.46 8.54	0.170.27 0.170.27	0.06 0.06	PG2.5-20R1 PG2.5-20R2

Module 3 Worms(Pressure Angle 1430')

Catalog No.	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Screw		Shape	Weight (kgf)
Catalog No.	Number of start	Hand of thread	L_H7	M	N	O	P	Q	Q'	R	Size	S	Shape	Weight (kgf)
SUW3-R1 [ DXF DWG \| 3D CAD] SUW3-R2 [ DXF DWG \| 3D CAD]	1 2	R R	16 16	35 35	44 44	50 50	50 50	20 20	- -	70 70	- -	- -	W1 W1	0.6 0.6

Lead Angle R1 3

55' R2 7

50'

Module 3 Worm Gears

Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	Bore	Hub dia.	Pitch dia.	Throat dia.	Outside dia.	Face width	Hub width (R)	Hub width (L)	Total length	Web thickness	Web O.D.	Mounting distance	Shape	Allowable torque (kgfm)	Allowable torque (Nm)	Backlash (mm)	Weight (kgf)	Catalog No.
Catalog No.	Reduction ratio	No. of teeth	Coefficient of profile shift	Number of start	Hand of thread	A_H7	B	C	D	D'	E	F	F'	G	H	I	J	Shape	Surface durability	Surface durability	Backlash (mm)	Weight (kgf)	Catalog No.
PG3-20R1 [ DXF\|DWG \| 3D CAD] PG3-20R2 [ DXF\|DWG \| 3D CAD]	1/20 1/10	20 20	-0.023 -0.094	1 2	R R	15 15	50 50	60.14 60.57	66 66	69 69	28 28	15 15	- -	43 43	- -	- -	52 52	H1 H1	1.4 1.41	13.68 13.81	0.190.29 0.190.29	0.12 0.12	PG3-20R1 PG3-20R2

*CAUTION:*	Before assembling or performing any secondary operations, please carefully read the "Application Hints" at the beginning of this section.
*CAUTION:*	These worm gears are profile shifted to create the proper center distance.
*NOTE:*	Allowable torques shown in the table are calculated using the Lewis formula.
*NOTE:*	SW worms may also be used to mate with PG worm gears.