Pinion Gears

Welcome to the widest range of standard racks & pinions in the World!  Consisting of both helical & straight (spur) tooth versions, in an assortment of sizes, materials and quality levels, to meet almost any axis drive requirements.

These drives are perfect for a wide range of applications, including axis drives requiring precise positioning & repeatability, traveling gantries & columns, pick & place robots, CNC routers and material handling systems.  Heavy load capacities and duty cycles can also be easily handled with this drives.  Industries served include Material Handling, Automation, Automotive, Aerospace, Machine Tool and Robotics.

Typical delivery time for these standard components is 2 to 3 weeks, which is ideal for OEM's requiring just-in-time delivery schedules.  Special and/or modified components are always possible - please consult the factory.

NEW Master Hardened & Ground Pinion Gears with DIN 6 quality level can be bored and modified to suit any application needs.

NEW Helical Hardened & Ground Pinion Gears with DIN 5 quality level and splined bores for mounting to precision planetary reducers.

Complete Range  |  Lubrication  |  PDF Files  |  Operating Manual   |  Application Sheet
 

There are five basic pinion gear styles available (click on style for PDF catalog pages):

Helical	Straight	ISO Flanged	Split-Pinion	Circular Pitch
These pinions have the teeth at an angle (19º 31' 42") for increased load capacity and quiet operation.	These pinions have the teeth perpendicular to pinion side, and are traditionally known as "spur".	These pinions were designed for mounting directly to ISO 9409-1 flanged reducers.	These pinions have two pinion halves which are spring-loaded against each other to provide zero backlash	These pinions have a circular pitch from tooth to tooth, such as 5, 10 and 13.33 mm.

A Compression Coupling can be used on pinions with side hubs to attach the pinion to the shaft without any backlash.  This option, which can be used in conjunction with a key, is best for applications with high reversing cycles and eliminates the possibility of fretting corrosion.

Helical versus Straight:  The helical style provides several key benefits over the straight style, including:

• They run quieter than the straight, especially at high speeds

• They have a higher contact ratio (the number of effective teeth engaged) than straight, which increases the load carrying capacity

• In most cases, they cost the same as the straight pinions!

The only possible disadvantage to using helical rack & pinions is that they could require more time to set up and align properly.
 

Pinion Gear Quality Levels Overview:

There are three basic quality levels of pinion gears:  Click on Series Numbers for PDF catalog pages.

Pinion Type:	Tooth Quality:	Typical Applications:	Helical:	Straight:
Soft	DIN 8 (~AGMA 10)	Light Loads Medium Accuracy	21 Series	21 Series 06-Series (Stainless) Cast Iron & Plastic
Induction Hardened *	DIN 10	Heavy Loads Low Accuracy	21 Series	21 Series
Hardened & Ground	DIN 5 ISO Flanged	Heavy Loads Ultra-High Accuracy	78 Series	78 Series
	DIN 5 Splined		79 Series	---
	DIN 6 Blank Bores	Heavy Loads High Accuracy	24.99 Series	24.98 Series
	DIN 7		24 Series	24 Series

* Induction-Hardened pinion are made from soft pinions.

For most rack and pinion applications, a hardened & ground pinion is typically used since it sees the most cycles.  The pinion is usually harder than the rack for this reason.

Pinion Range Overview:

Click on the "Series" number in left column to view associated PDF catalog page.
 

Series	Style	Pinion Description	Modules Available	Tooth Heat Treatment	Quality Level
06	Straight	Soft, Stainless	1, 1.5, 2, 3	None	~AGMA 10
07	Straight	Soft	5 & 10 mm Circular Pitch	Optional	~AGMA 10
20	Straight & Helical	Hardened & Ground Pinion Shafts	2, 3, 4, 5, 6	Case-Hardened	~AGMA 12
21	Straight	Soft	1, 1.5, 2, 2.5, 3, 4, 5, 6, 8	Optional	~AGMA 10
21	Helical	Soft	2, 3, 4, 5, 6, 8	Optional	~AGMA 10
22	Straight	Plastic	1, 1.5, 2, 2.5, 3	None	~AGMA 9
23	Straight	Cast Iron	1.5, 2, 2.5, 3, 4, 5, 6	None	~AGMA 10
24	Straight	Hardened & Ground	2, 3, 4, 5, 6	Case-Hardened	~AGMA 11
24.98	Straight	Hardened & Ground with Blank Bores	2, 3, 4, 5	Case-Hardened	DIN 6
24	Helical	Hardened & Ground	2, 3, 4, 5, 6, 8	Case-Hardened	~AGMA 11
24.99	Helical	Hardened & Ground with Blank Bores	2, 3, 4, 5, 6, 8	Case-Hardened	DIN 6
24.0	Straight	Hardened & Ground	5, 10 & 13.33 mm Circular Pitch	Case-Hardened	~AGMA 11
74	Helical	Hardened & Ground Split-Pinions	2, 3, 4, 5, 6, 8	Case-Hardened	~AGMA 11
78	Helical	ISO 9409-1-A Flanged	2, 3, 4, 5	Case-Hardened	DIN 5
78h	Helical	TR ISO 9409-1-A Flanged	2, 3, 4, 5, 6, 8	Case-Hardened	DIN 5
78s	Straight	TR ISO 9409-1-A Flanged	2, 3, 4, 5, 6, 8	Case-Hardened	DIN 5
79	Helical	DIN 5480 Splined Bore	2, 3, 4	Case-Hardened	~AGMA 12
80	Compression Couplings

 

Lubrication:

With open gearing such as rack & pinions, lubrication is critical!  A thin film of grease or oil should always be on the contacting tooth flanks to ensure there is no metal-to-metal contact, which can damage the teeth.

It is recommended to use our Automatic Lubrication System, which pumps grease through a felt gear applicator and meshes directly to the pinion or the rack.  This provides continuous lubrication at the tooth flanks, extending the lifetime and maintaining the quality of the gearing.

For more information on our Automatic Lubrication Systems, please follow this link.

Gear Racks, consisting of both helical & straight (spur) tooth versions, in an assortment of sizes, materials and quality levels, to meet almost any axis drive requirements.

ISO Flanged Pinions, are provided with ISO 9409-1 flanges to mount directly to our High-Torque (HT) Servo-Worm Reducers and popular planetary gearboxes, such as Alpha TP, Stober PH, Apex AD and Neugart PLF.  This interface provides a tight integration of the pinion to the gearbox output, reducing overhung loading and backlash between the components.  The pinions are easily mounted and replaceable if future repair is needed.

Servo Reducers are available in five levels of precision to meet any application needs.  Perfect for use in applications that demand high performance, precise positioning and repeatability.  Angular backlash levels down to less than 1 arc-minutes are available as standard.  Optional integral pinion shafts are also available to mount directly to hollow output shaft.