TEL : +81 48 254 1744

Screw Gears

Screw Gears Used for Non-Intersecting Shafts

SUN_ScrewGears

Screw gears, also sometimes called crossed helical gears, are helical gears used in motion transmission between non-intersecting shafts. The helical gears used in parallel shafts have the same helix angle but in the opposite directions. For shaft angles other than parallel, an arbitrary helix angle can be chosen, and, assuming no profile shift, the intersecting angle of the shafts is the sum of the respective helix angles. Helical gears have point contacts and have lower efficiency than parallel or perpendicular shaft gears and cannot transmit heavy loads.

Also, if the same material is used in screw gears, it could lead to friction and galling. Therefore, KHK recommends the use of different materials in a pair. Besides, unlike bevel gears, there are no restrictions on the numbers of teeth combinations and the speed transmission ratio becomes the number of teeth of the driving gear divided by the number of teeth of the driven gear. Please consult the “Gear Applications” pages for the actual working of screw gears.

button to gear select page
Please enter part number here for a price and a drawing of the gear

NOTICE: Use of CAD Drawings
The tooth profile detailed in the CAD drawing differs from that of the actual gear.
Also, please note that the details of any chamfer, fillet, or slotted groove on the CAD drawing may differ from the true values or shape on the actual product.

Technical Information of Screw Gears

With this technical data you can view comprehensive information regarding KHK gears such as their features and advice and warnings when selecting and using them.

SN_steel_screw_gears

SN

Steel Screw Gears

Module : 1 – 4
Material : S45C
Hardening : None
Tooth finish : Cut (non-ground)
Grade : JIS N9 (Please see details on PDF)

Many lineups are available at a low price. The teeth can be hardened.

Click Here to Select Screw Gears
SUN_ScrewGears

SUN

Stainless Steel Screw Gears

Module : 1 – 3
Material : SUS303
Hardening : None
Tooth finish : Cut (non-ground)
Grade : JIS N9 (Please see details on PDF)

Stainless steel gears with rust resistance.

Click Here to Select Screw Gears
AN_ScrewGears

AN

Aluminum Bronze Screw Gears

Module : 1 – 3
Material : CAC702 (AlBC2)
Hardening : None
Tooth finish : Cut (non-ground)
Grade : JIS N9 (Please see details on PDF)

Aluminum bronze made gears with excellent wear resistance.

Click Here to Select Screw Gears
PN_ScrewGears

PN

Plastic Screw Gears

Module : 1 – 3
Material : MC901
Hardening : None
Tooth finish : Cut (non-ground)
Grade : JIS N10 equivalent

Nylon gears can be used with no lubrication.

Click Here to Select Screw Gears

Related links :
Helical Gears– Main page of helical gears
Equivalent tables of each standard relating to raw materials and precision grades of gears
Plastic Gears– A page of plastic gears
交错轴斜齿轮 (螺旋齿轮) - 中文页

Go to Top