Spur Gears

The most common type of gears are spur gears, also known as straight-cut gears, and can be found in a multitude of applications. They have been specifically designed to transmit large amounts of power by placing them on parallel shafts which rotate in opposite directions.
Spur gears have an involute profile with straight teeth which project radially and are parallel to the rotation of the axis. This allows for a smoother operation between each gear and permits greater mounting distances. Spur gears can have a central hub or be hubless.
The standard pressure angles in spur gears are 14.5, 20 and 25 degrees, and refer to the angle that force is transmitted between the meshing gears.
Spur gears are capable of meshing with other gears, with many gears being used to create large gear reductions. When they are meshed the gear with the most teeth is referred to as the “gear”, whereas the one with smaller teeth is referred to as the “pinion”.
So what are the advantages?
• High transmission efficiency
• Compact and very easy to install
• Constant velocity ratio
• No slippage – unlike belt drives
• Highly reliable
• Can transmit large amounts of power
Types of spur gears
Plastic spur gears are commonly made from acetal or nylon and have many positive characteristics including being lightweight, non-rusting and quiet. They enable low cost and large production capabilities, and are also able to operate without lubrication. For hygiene reasons, plastic spur gears are an excellent choice for use in industries dealing with food production and medical equipment.
Metal spur gears have more strength, load-carrying capacity and heat resilience than their plastic counterpart. They are more dimensionally stable compared to plastic and can be made from many metals such as aluminium, brass and stainless steel.
Common applications
• Metal cutting machines
• Power plants
• Marine engines
• Mechanical clocks and watches
• Fuel pumps
• Washing machines
• Gear motors and gear pumps
• Rack and pinion mechanisms
• Material handling equipment
• Automobile gear boxes
• Steel mills
• Rolling mills
Spur gears are however very loud and so will not be found in vehicles. When the teeth collide with each other there is an impact noise which is really loud compared to the helical gears found in cars.

...
Read more Read less

Filters

Viewing 41 - 60 of 313 products
Results per page
Description Price Module Number of Teeth Material Bore Diameter Hub Diameter Pitch Diameter Face Width
RS Stock No. 521-7635
BrandRS PRO
HK$54.08
Each
units
1 56 POM 8mm 18mm 56mm 6mm
RS Stock No. 878-7821
BrandRS PRO
HK$114.25
Each
units
0.5 20 Steel 4mm 9mm 10mm 4mm
RS Stock No. 521-7073
BrandRS PRO
HK$19.53
Each
units
0.5 32 POM 5mm 10mm 16mm 3mm
RS Stock No. 182-7929
BrandRS PRO
HK$107.18
Each
units
1.5 25 - 8mm 19mm 37.5mm 12mm
RS Stock No. 182-7971
BrandRS PRO
HK$67.59
Each
units
1 30 - 6mm 15mm 30mm 9mm
RS Stock No. 182-7839
BrandRS PRO
HK$156.91
Each
units
1.5 26 Steel 12mm 30mm 39mm 17mm
RS Stock No. 521-6711
BrandRS PRO
HK$148.47
Each
units
1 15 Stainless Steel 8mm 17mm 15mm 10mm
RS Stock No. 521-7168
BrandRS PRO
HK$20.12
Each
units
0.5 56 POM 6mm 14mm 28mm 3mm
RS Stock No. 878-7865
BrandRS PRO
HK$74.96
Each
units
0.8 20 Steel 6mm 12mm 16mm 6mm
RS Stock No. 521-7297
BrandRS PRO
HK$22.01
Each
units
0.8 25 POM 5mm 10mm 20mm 4mm
RS Stock No. 182-7932
BrandRS PRO
HK$121.18
Each
units
1.5 32 - 10mm 24mm 48mm 12mm
RS Stock No. 182-7946
BrandRS PRO
HK$120.70
Each
units
2 16 - 8mm 17.5mm 32mm 15mm
RS Stock No. 521-6531
BrandRS PRO
HK$602.32
Each
units
1.5 80 Steel 15mm 60mm 120mm 15mm
RS Stock No. 521-6496
BrandRS PRO
HK$194.74
Each
units
1.5 40 Steel 12mm 45mm 60mm 15mm
RS Stock No. 182-7870
BrandRS PRO
HK$178.64
Each
units
0.7 35 Steel 5mm 15mm 24.5mm 5mm
RS Stock No. 521-7584
BrandRS PRO
HK$52.80
Each
units
1 40 POM 8mm 16mm 40mm 6mm
RS Stock No. 878-7875
BrandRS PRO
HK$100.91
Each
units
0.8 32 Steel 6mm 12mm 25.6mm 6mm
RS Stock No. 521-6519
BrandRS PRO
HK$229.96
Each
units
1.5 50 Steel 12mm 45mm 75mm 15mm
RS Stock No. 521-7506
BrandRS PRO
HK$30.24
Each
units
1 20 POM 5mm 11.7mm 20mm 6mm
RS Stock No. 182-7976
BrandRS PRO
HK$90.77
Each
units
1 45 - 8mm 18mm 45mm 9mm
Related Products
The K7L-AT50 liquid leakage sensor amplifier by Omron ...
Description:
The K7L-AT50 liquid leakage sensor amplifier by Omron can detect a wide variety of liquids ranging from water to chemicals with low conductivity. It internally oscillates AC signals provided to the Sensing Band, protecting it from electric corrosion and ensuring ...
Flowline's general purpose range of level controller displays ...
Description:
Flowline's general purpose range of level controller displays which cover an assortment of engineering units. Comes equipped with either a 4-20mA or 0-10mA level sensor inputs, with various configurations to ensure your application is covered. Optional 2 or 4 programmable ...
A series of liquid level control relays from ...
Description:
A series of liquid level control relays from ABB for conductive liquids. The CM-ENS range gives a choice of 3 variants each with a compact, space saving housing with the highest fire protection and environmentally friendly materials. Installation is quick ...
The MultiTrode indicator probe provides continuous level indication ...
Description:
The MultiTrode indicator probe provides continuous level indication and pump control. The probe can be connected to a PLC or dedicated pump controller system. The 10 digital outputs provide a mechanism for simple pump control without any other control device. ...