KHK Worm Gears Catalogue - KHK - (Version JPG) - Page n° 2 - PDF Catalogue | Technical Documentation

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lir Worm Gear Pair

Characteristics

The simplest way to obtain a large speed reduction with high torque in a compact space is with worm gear drives. KHK stock worms and worm wheels are available in modules 0.5 to 6 and in speed ratios of 1/10 to 1/120, made in a variety of materials and styles. We also offer stock duplex worms and worm wheels with which you can obtain a very low backlash, high rotational precision system. The following table lists the main features for easy selection.


Type		Catalog No.	Module	No. of threads or reduction ratio	Material ( ) JIS	Heat treatment	^sfS^e	Precision KHKW001 NOTE⁰⁰!	Features
Duplex Worms & Worm Wheels	Worm	KWGDL	2-4	Single thread	SCM440	Thermal refined, gear teeth induction hardened	Ground	1	Duplex lead worms have slightly different leads and lead angles on the opposite face of the gear tooth. A range of backlash can be obtained by moving the worm axially. Worms have a high precision ground finish while worm wheels are made of abrasion-resistant Aluminum Bronze, making these the top-grade products. Worms come in bore type and shaft type styles.
	Worm	KWGDLS	1.5-4	Single thread	SCM440	Thermal refined, gear teeth induction hardened	Ground	1
	Worm Wheel	AGDL	1.5-4	20-60	CAC702 (AIBC2)	—	Cut	1
Worms & Worm Gears	Worm	KWG	0.5-6	Single thread -Double thread	SCM440	Thermal refined, gear teeth induction hardened	Ground	2	Use of worm shafts eliminate the need to attach worms to shafts. Machining of bearing journal can be performed on the shafts. KWG2 or larger worm shafts have smaller pitch diameters than the comparable SWG worms, which allow more compact design with higher efficiency.
	Worm Wheel	AG NOTE 1	0.5-1.5	10-60	CAC702 (AIBC2)	—	Cut	2
	Worm Wheel	AGF note 1	2-6	10-60	CAC702 (AIBC2)	—	Cut	2
	Worm	SWG	1-6	Single thread -Triple thread	S45C	hardened	Ground	2	Superior strength and wear-resistance lead to compact designs with these gears. They have the same center distances as the more popular SW/CG series which permit substitution of these in place of SW/CG series for more demanding applications.
	Worm Wheel	AG NOTE 1	1-6	10-60	CAC702 (AIBC2)	—	Cut	2
	Worm	SW	0.5-6	Single thread -Double thread	S45C	—	(_T^Crea_droM	4	A large selection is available in these economical and most popular series. Modules range from 0.5 to 6 and speed ratios from 1/10 to 1/120. Worm wheels are also available in lightweight MC nylon which can be used without lubrication.
	Worm	SUW	0.5-3	Single thread -Double thread	SUS303	—	Cut	4
	Worm Wheel	CG	1 -6	10-120	FC200	—	Cut	4
	Worm Wheel	BG	0.8-6	10-60	CAC502 (PBC2)	—	Cut	4
	Worm Wheel	PG	1-3	10-50	MC901	—	Cut	5
	Worm Wheel	DG	0.5-0.8	10-60	Polyacetal	—	Cut	5

[NOTE 1] The material of cast hubs for AGF and AG worm wheels is FC200(Cast Iron). AG worm wheels mate primarily with SWG worms. But, for

Modules 0.8 or smaller, AG worm wheels mate with KWG worms. [NOTE 2] KHK stock worms and worm wheels are produced to KHK's own precision grades. See the "Precision of Worms and Worm Gears" in

the "Selection Hints" section.

Our precision gear cutting technology enables acceleration and noise reduction

Setting the proper tooth contact and the backlash is essential for using worm gears. Use KHK stock worm gears for safe, reliable use.

Worm Grinding Machine by Klingelnberg Worm gear testing machine by Klingelnberg

KHK Worm Gears Catalogue - KHK - #2

Flexible coupling, Coupling, Plastic gear, Gear, Gear coupling