Round racks / contact angle 20 degrees / dimension L Standard

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Back to the Category Rack Gear

Technical drawing - Rack Gears

Round Gear Racks/Pressure Angle 20Deg./Standard L Dimension:Related Image

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Available dimensions and tolerances can be found under the tab More Information.

Basic properties (e.g., material, hardness, coating, tolerance) - Rack Gears

Type		Material	Surface Treatment
L Fixed	L Configurable	Material	Surface Treatment
RGMA	RGMAL	EN 1.1191 Equiv.	Black Oxide
RGMAS	RGMASL	EN 1.4305 Equiv.	-

Further specifications can be found under the tab More Information.

Composition of a product code - Rack Gears

Part Number	-	Nominal Length L
RGMA1.0 RGMAL0.8	- -	500 205

Alterations - Rack Gears

General information - Rack Gears

Rack gear product assortment - steel rack gear - stainless steel rack gear - brass rack gear - plastic rack gear - hardened rack gear

Selection Details of Rack Gears

-Material: steel, stainless steel, brass, plastic

-Coatings: uncoated, burnished

-Heat treatment: untreated, surface curing (induction hardened)

-Module: 0.5, 0.8, 1, 1.5, 2, 2.5, 3

-Width: 3 to 30 mm

-Number of teeth: 9 to 192

-Outer diameter (round): 8 to 30 mm

-Length: 20 to 1980 mm

Description / Rack Gear Basics

The rack gear from MISUMI are fundamentally used for motion conversion. The rack gear allows converting a rotary motion into a linear motion or a linear motion into a rotary motion. A rack gear can transmit high forces due to the form-fitting gearing. In connection with a gear wheel or spur gear, a gear rack drive forms a slip-free transmission of force and prevents a slip-through. For a large number of applications, the slip-free transmission of the rack gear is an efficient transmission of force and motion. The rack gear drive also withstands high loads with a compact design. With rack gears, high speeds can also be driven in applications with low noise generation. With MISUMI, you can configure your rack gears individually in length and in other parameters.

During the transfer of motion, the teeth intertwine and largely unroll during the transfer to one another. The rack gear can be used for the transfer of motion almost over the entire length. To prevent the gear wheel from overflowing, for example, stopper bolts or stopper blocks are recommended. Since the module is standardized, it must be ensured for the construction of a rack drive that the same module is used for the rack and the gear wheel. The rack gear allows precise control by directly transmitting motion, torque and speed.

For high wear resistance and reliability, our product range also offers surface-hardened rack gears. The hardened rack gear has a harder surface of the teeth, which makes it less susceptible to wear and tear. Their long service life helps reduce production downtime. Hardened rack gears are also less susceptible to locking-related play and retain their precision in the long term. This aspect makes hardened rack gears particularly recommended for precise applications.

A rack gear drive has a low backlash. In general, the tooth flank clearance is used for assembly and thermal expansion. Like the head play, it can serve as a gap for lubricants. For very precise applications, the reverse play is not beneficial. In order to minimize this during precision applications, pre-tensioning is required. On lifting tables, the dead weight already generates a vertical pretension in the rack gear, which minimizes the reverse play. If the rack gear is aligned horizontally, a separate pretension should be used to reduce the reverse play. This can be achieved with tension springs or other exciting components, for example. When selecting a suitable rack gear, the first decision criterion is the material of the rack gear drive. The following are some advantages of the rack gear materials:

Steel rack gears

Rack gears made of steel have high strength and withstand high loads. Therefore, steel rack gears are suitable for heavy loads. The material surface can be hardened to increase wear resistance. This makes the rack gear resistant and durable. In addition, steel is very heat-resistant and is suitable for applications in which high ambient temperatures occur. One disadvantage of steel is its low corrosion resistance.

Stainless steel rack gears

Stainless steel rack gears are highly corrosion resistant, since stainless steel forms a passive layer (oxide layer). This makes them suitable for applications where higher humidity is found. Furthermore, stainless steel offers good chemical resistance. Like steel, stainless steel is temperature resistant without losing strength. High temperatures can cause discoloration (tempering colour) in stainless steel. However, this does not affect the function in any way. Similar to the steel, stainless steel is robust and has a long service life. Another advantage is that rack gears made of stainless steel have hygienic properties. Therefore, this material is often used in the pharmaceutical industry and in medical technology.

Brass rack gears

Brass rack gears are well protected against corrosion. Therefore, a brass rack gear is well suited in corrosive environments. Depending on the application, it can be advantageous that brass does not tend to spark when abrasion is applied. In addition, brass has a high strength and ductility. This allows the material to deform before it breaks. Brass rack gears have a high thermal conductivity, which allows heat to be dissipated similar to a heat sink. The perhaps most important property of the brass rack gear is its gliding property. In the case of a lubrication film dissipates, this property serves as a certain fail-safe.

Lubrication of rack gears

The lubrication of the rack gear is decisive for low-wear operation. The lubrication reduces the friction on the tooth flanks of the rack gear and the pinion, which reduces the material abrasion. In this way, proper lubrication of the rack gear increases the service life, performance and ensures long-term precision. In principle, a rack can be lubricated with grease or oil. The type of lubrication that is suitable depends on several factors such as temperature, load and speed. Grease lubrication is often used for high loads and torques, while oil lubrication is used for high speeds. Lubricant manufacturers offer a suitable lubricant for almost all load cases. Before re-lubricating, the tooth drive should be thoroughly cleaned to prevent damage to the tooth flanks or teeth from contamination. Depending on the application, the lubricant can be sprayed, brushed, or sprayed onto the rack gear. The lubrication intervals must be selected depending on the application and the lubricant used. It is always recommended to adjust the lubrication intervals to the given circumstances.

Application examples - Rack Gears

Application example: rack gear - round rack gear - rack gear with spur gear - rack gear with pinion - rack gear with handle

Application example - rack gear with spur gear
(1) Spur gear, (2) Clamping knobs, (3) Rack gear

Industrial applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

Part Number:

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Part Number
RGMA0.5-300
RGMA0.8-300
RGMA1.0-300
RGMA1.0-500
RGMA1.5-300
RGMA1.5-500
RGMA2.0-300
RGMA2.0-500
RGMA2.5-300
RGMA2.5-500
RGMA3.0-300
RGMA3.0-500
RGMAL0.5-[50-280/1]
RGMAL0.8-[50-280/1]
RGMAL1.0-[50-480/1]
RGMAL1.5-[50-480/1]
RGMAL2.0-[50-480/1]
RGMAL2.5-[50-480/1]
RGMAL3.0-[50-480/1]
RGMAS0.5-300
RGMAS0.8-300
RGMAS1.0-300
RGMAS1.0-500
RGMAS1.5-300
RGMAS1.5-500
RGMAS2.0-300
RGMAS2.0-500
RGMAS2.5-300
RGMAS2.5-500
RGMAS3.0-300
RGMAS3.0-500
RGMASL0.5-[50-280/1]
RGMASL0.8-[50-280/1]
RGMASL1.0-[50-480/1]
RGMASL1.5-[50-480/1]
RGMASL2.0-[50-480/1]
RGMASL2.5-[50-480/1]
RGMASL3.0-[50-480/1]

Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Module (M) / Circular Pitch (P)	Length L (mm)	Surface Treatment	Number of Effective Teeth (teeth)	Tooth Width W (or D) (mm)	Rack Dia. (Ø)	Rack Height (mm)	Nominal
71.48 €	1	Available	7 Days	10	0.5	301.59	Black Oxide	192	8	8	7.5	300
71.87 €	1	Available	7 Days	10	0.8	301.59	Black Oxide	120	8	8	7.2	300
58.32 €	1	Available	7 Days	10	1	298.45	Black Oxide	95	10	10	9	300
93.50 €	1	Available	7 Days	10	1	499.51	Black Oxide	159	10	10	9	500
60.73 €	1	Available	7 Days	10	1.5	296.88	Black Oxide	63	15	15	13.5	300
98.68 €	1	Available	7 Days	10	1.5	499.51	Black Oxide	106	15	15	13.5	500
64.79 €	1	Available	7 Days	10	2	295.31	Black Oxide	47	20	20	18	300
107.56 €	1	Available	7 Days	10	2	496.37	Black Oxide	79	20	20	18	500
77.44 €	1	Available	7 Days	10	2.5	298.45	Black Oxide	38	25	25	22.5	300
128.05 €	1	Available	7 Days	10	2.5	494.8	Black Oxide	63	25	25	22.5	500
91.73 €	1	Available	7 Days	10	3	292.17	Black Oxide	31	30	30	27	300
150.18 €	1	Available	7 Days	10	3	499.51	Black Oxide	53	30	30	27	500
-	1		7 Days	10	0.5	50 ～ 280	Black Oxide	-	8	8	7.5	-
-	1		7 Days	10	0.8	50 ～ 280	Black Oxide	-	8	8	7.2	-
-	1		7 Days	10	1	50 ～ 480	Black Oxide	-	10	10	9	-
-	1		7 Days	10	1.5	50 ～ 480	Black Oxide	-	15	15	13.5	-
-	1		7 Days	10	2	50 ～ 480	Black Oxide	-	20	20	18	-
-	1		7 Days	10	2.5	50 ～ 480	Black Oxide	-	25	25	22.5	-
-	1		7 Days	10	3	50 ～ 480	Black Oxide	-	30	30	27	-
134.74 €	1	Available	7 Days	10	0.5	301.59	Not Provided	192	8	8	7.5	300
112.23 €	1	Available	7 Days	10	0.8	301.59	Not Provided	120	8	8	7.2	300
86.92 €	1	Available	7 Days	10	1	298.45	Not Provided	95	10	10	9	300
133.87 €	1	Available	7 Days	10	1	499.51	Not Provided	159	10	10	9	500
94.52 €	1	Available	7 Days	10	1.5	296.88	Not Provided	63	15	15	13.5	300
142.35 €	1	Available	7 Days	10	1.5	499.51	Not Provided	106	15	15	13.5	500
99.69 €	1	Available	7 Days	10	2	295.31	Not Provided	47	20	20	18	300
158.16 €	1	Available	7 Days	10	2	496.37	Not Provided	79	20	20	18	500
104.39 €	1	Available	7 Days	10	2.5	298.45	Not Provided	38	25	25	22.5	300
166.01 €	1	Available	7 Days	10	2.5	494.8	Not Provided	63	25	25	22.5	500
134.36 €	1	Available	7 Days	10	3	292.17	Not Provided	31	30	30	27	300
213.45 € 149.42 €	1	Available	Same day Stock	10	3	499.51	Not Provided	53	30	30	27	500
-	1		7 Days	10	0.5	50 ～ 280	Not Provided	-	8	8	7.5	-
-	1		7 Days	10	0.8	50 ～ 280	Not Provided	-	8	8	7.2	-
-	1		7 Days	10	1	50 ～ 480	Not Provided	-	10	10	9	-
-	1		7 Days	10	1.5	50 ～ 480	Not Provided	-	15	15	13.5	-
-	1		7 Days	10	2	50 ～ 480	Not Provided	-	20	20	18	-
-	1		7 Days	10	2.5	50 ～ 480	Not Provided	-	25	25	22.5	-
-	1		7 Days	10	3	50 ～ 480	Not Provided	-	30	30	27	-

Back to the Category Rack Gear

Technical drawing - Rack Gears

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Available dimensions and tolerances can be found under the tab More information.

Specification Tables - Rack Gears

■L Fixed

Part Number		Nominal	Effective Number of Teeth (Z)	D (h9)	(L)	h	Unit Price
Type	Module	Nominal	Effective Number of Teeth (Z)	D (h9)	(L)	h	Unit Price
RGMA (EN 1.1191 Equiv.)	0.5	300	192	8	301.59	7.5
	0.8	300	120	8	301.59	7.2
	1.0	300	95	10	298.45	9
	1.0	500	159	10	499.51	9
	1.5	300	63	15	296.88	13.5
	1.5	500	106	15	499.51	13.5
	2.0	300	47	20	295.31	18
	2.0	500	79	20	496.37	18
	2.5	300	38	25	298.45	22.5
	2.5	500	63	25	494.80	22.5
	3.0	300	31	30	292.17	27
	3.0	500	53	30	499.51	27
RGMAS (EN 1.4305 Equiv.)	0.5	300	192	8	301.59	7.5
	0.8	300	120	8	301.59	7.2
	1.0	300	95	10	298.45	9
	1.0	500	159	10	499.51	9
	1.5	300	63	15	296.88	13.5
	1.5	500	106	15	499.51	13.5
	2.0	300	47	20	295.31	18
	2.0	500	79	20	496.37	18
	2.5	300	38	25	298.45	22.5
	2.5	500	63	25	494.80	22.5
	3.0	300	31	30	292.17	27
	3.0	500	53	30	499.51	27

■L Configurable

Part Number		Overall Length L 1mm Increment	D (h9)	h	Unit Price
Type	Module	Overall Length L 1mm Increment	D (h9)	h	L50~99	L100~199	L200~300	L301~500
RGMAL (EN 1.1191 Equiv.)	0.5	50~280	8	7.5				-
	0.8	50~280	8	7.2				-
	1.0	50~480	10	9
	1.5		15	13.5
	2.0		20	18
	2.5		25	22.5
	3.0		30	27
RGMASL (EN 1.4305 Equiv.)	0.5	50~280	8	7.5				-
	0.8	50~280	8	7.2				-
	1.0	50~480	10	9
	1.5		15	13.5
	2.0		20	18
	2.5		25	22.5
	3.0		30	27

Alterations - Rack Gears

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Basic information

Tooth Type	Standard	Shape	Round Rack Gears	Heat Treatment	Not Provided
Ground Tooth	Not Provided

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Basic Attributes

Module (M) / Circular Pitch (P)
0.5

0.8

1

1.5

2

2.5

3
Clear
Length L(mm)
292.17

295.31

296.88

298.45

301.59

494.8

496.37

499.51
[50-480/1mm Unit(s)]
Clear
Surface Treatment
- Not Provided
- Black Oxide
Clear
Number of Effective Teeth(teeth)
31

38

47

53

63

79

95

106

120

159

192
Clear
Tooth Width W (or D)(mm)
8

10

15

20

25

30
Clear
Rack Dia.(Ø)
8

10

15

20

25

30
Clear
Nominal
- 300
- 500
Clear
Type
- RGMA
- RGMAL
- RGMAS
- RGMASL
Clear
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
What are rack gears for?: Answer:
Rack gears are machine elements that convert rotary motion into linear motion. This can also be done in reverse order. The rack gear can transmit high forces directly and without slip with a gear wheel.
Question:
What materials are used for rack gears?: Answer:
MISUMI’s rack gears are made of steel, stainless steel (stainless steel), brass and plastic. Each material offers different properties that must be selected to suit a wide range of requirements.
Question:
What types of rack gears do you offer?: Answer:
There are straight-toothed rack gears and slanted rack gears. The rack gears with straight gearing are often used to implement linear motion. The obliquely toothed rack gears are often used for conversion into a rotation.
Question:
How are rack gears lubricated?: Answer:
In most cases, a rack gear is lubricated with grease or oil. The appropriate lubricant should be used depending on the application (heavy loads, high temperature, high speed). For high-speed applications, oil is usually used. A grease is often used in heavy load applications.
Question:
What are the advantages of rack gears?: Answer:
Rack gears withstand high loads and have a long service life. At the same time, rack gears are very precise and easy to assemble.