Rack gears / contact angle 20 degrees / dimension L standard

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Back to the Category Rack Gear

Technical drawing - Rack Gears

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
Both Ends Machined	Economy	Material	Surface Treatment
RGEA	RGEAR	EN 1.1191 Equiv.	Black Oxide
RGEAB	-	Free-Cutting Brass Bar	-
RGEAS	-	EN 1.4301 Equiv.	-
RGEAM	RGEAMR	MC Nylon	-

RGEAM, RGEAMR (MC Nylon) dimensions may change depending on the operating environment.

Further specifications can be found under the tab More Information.

Composition of a product code - Rack Gears

Part Number	-	Nominal	-	Hole Machining
RGEA1.0 RGEAR1.0	- -	500 500	- -	A N

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
RGEAMR1.0-500-N
RGEAMR1.5-500-N
RGEAMR2.0-500-N
RGEAMR2.5-500-N
RGEAMR3.0-500-N
RGEAR1.0-100-N
RGEAR1.0-300-N
RGEAR1.0-500-N
RGEAR1.5-100-N
RGEAR1.5-300-N
RGEAR1.5-500-N
RGEAR2.0-100-N
RGEAR2.0-300-N
RGEAR2.0-500-N
RGEAR2.5-100-N
RGEAR2.5-300-N
RGEAR2.5-500-N
RGEAR3.0-100-N
RGEAR3.0-300-N
RGEAR3.0-500-N

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Module (M) / Circular Pitch (P)	Length L (mm)	Material	Ground Tooth	Surface Treatment	Number of Effective Teeth (teeth)	Tooth Width W (or D) (mm)	End Face Machining	Rack Height (mm)	Nominal	Hole Machining
71.10 €	1	7 Days	10	1	505	Resin	Not Provided	Not Provided	159	10	Economy Type	12	500	N (No Hole machining)
85.78 €	1	7 Days	10	1.5	505	Resin	Not Provided	Not Provided	105	15	Economy Type	20	500	N (No Hole machining)
109.45 €	1	7 Days	10	2	505	Resin	Not Provided	Not Provided	79	20	Economy Type	25	500	N (No Hole machining)
142.21 €	1	7 Days	10	2.5	505	Resin	Not Provided	Not Provided	63	25	Economy Type	30	500	N (No Hole machining)
170.43 €	1	7 Days	10	3	505	Resin	Not Provided	Not Provided	52	30	Economy Type	35	500	N (No Hole machining)
7.34 €	1	Same day Stock	10	1	98	-	Not Provided	Black Oxide	29	10	Economy Type	12	100	N (No Hole machining)
20.36 €	1	7 Days	10	1	303	-	Not Provided	Black Oxide	94	10	Economy Type	12	300	N (No Hole machining)
36.95 €	1	7 Days	10	1	505	-	Not Provided	Black Oxide	159	10	Economy Type	12	500	N (No Hole machining)
8.90 €	1	7 Days	10	1.5	101	-	Not Provided	Black Oxide	20	15	Economy Type	20	100	N (No Hole machining)
22.02 €	1	7 Days	10	1.5	303	-	Not Provided	Black Oxide	62	15	Economy Type	20	300	N (No Hole machining)
38.34 €	1	7 Days	10	1.5	505	-	Not Provided	Black Oxide	105	15	Economy Type	20	500	N (No Hole machining)
10.12 €	1	7 Days	10	2	98	-	Not Provided	Black Oxide	14	20	Economy Type	25	100	N (No Hole machining)
28.96 €	1	7 Days	10	2	303	-	Not Provided	Black Oxide	46	20	Economy Type	25	300	N (No Hole machining)
47.58 €	1	7 Days	10	2	505	-	Not Provided	Black Oxide	79	20	Economy Type	25	500	N (No Hole machining)
15.01 €	1	7 Days	10	2.5	100	-	Not Provided	Black Oxide	11	25	Economy Type	30	100	N (No Hole machining)
39.22 €	1	7 Days	10	2.5	303	-	Not Provided	Black Oxide	37	25	Economy Type	30	300	N (No Hole machining)
61.49 €	1	7 Days	10	2.5	505	-	Not Provided	Black Oxide	63	25	Economy Type	30	500	N (No Hole machining)
17.84 €	1	7 Days	10	3	101	-	Not Provided	Black Oxide	9	30	Economy Type	35	100	N (No Hole machining)
51.13 €	1	7 Days	10	3	303	-	Not Provided	Black Oxide	30	30	Economy Type	35	300	N (No Hole machining)
83.63 €	1	7 Days	10	3	505	-	Not Provided	Black Oxide	52	30	Economy Type	35	500	N (No Hole machining)

Back to the Category Rack Gear

Technical drawing - Rack Gears

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

Open the technical drawing in the new window

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

Specification Tables - Rack Gears

Part Number		Nominal	Hole Machining	Number of Effective Teeth	L	P (Pitch)	W	H	h	B (Hole Pitch)	M (Coarse)	d₁	d₂	Z₁	K (Number of Holes)	Unit Price
Type	Module															Economy Type	Both Ends Machined Type
Type	Module															Hole Machining N	Hole Machining N	Hole Machining A	Hole Machining ST	Hole Machining Z
(EN 1.1191 Equiv.) Both Ends Machined Type RGEA Economy Type RGEAR	1.0	100	N (No Hole Machining) A (Bottom Tapped) ST (Side Tapped) Z (Side Counterbored)	30(29)	94.25(98)	3.142	10	12	11	180	M3	3.5	6.5	3.5	-			-	-	-
		300		95(94)	298.45(303)										2
		500		159	499.51(505)										3
	1.5	100		21(20)	98.96(101)	4.712	15	20	18.5	180	M4	4.5	8	4.5	-			-	-	-
		300		63(62)	296.88(303)										2
		500		106(105)	499.51(505)										3
	2.0	100		15(14)	94.25(98)	6.283	20	25	23	180	M5	5.5	9.5	5.5	-			-	-	-
		300		47(46)	295.31(303)										2
		500		79	496.37(505)										3
	2.5	100		12(11)	94.25(100)	7.854	25	30	27.5	180	M5	5.5	9.5	5.5	-			-	-	-
		300		38(37)	298.45(303)										2
		500		63	494.8(505)										3
	3.0	100		10(9)	94.25(101)	9.424	30	35	32	180	M5	5.5	9.5	5.5	-			-	-	-
		300		31(30)	292.17(303)										2
		500		53(52)	499.51(505)										3
(Free-Cutting Brass Bar) RGEAB	0.5	300	N	192	301.59	1.571	3	9	8.5	-	-	-	-	-	-	-		-	-	-
(Free-Cutting Brass Bar) RGEAB	0.8	300	N	120	301.59	2.513	4	10	9.2	-	-	-	-	-	-	-		-	-	-
(EN 1.4301 Equiv.) RGEAS	0.5	300	N	192	301.59	1.571	3	9	8.5	-	-	-	-	-	-	-		-	-	-
	0.8	300	N	120	301.59	2.513	4	10	9.2	-	-	-	-	-	-	-		-	-	-
	1.0	300	N (No Hole Machining) A (Bottom Tapped) ST (Side Tapped) Z (Side Counterbored)	95	298.45	3.142	10	10	9	180	M3	3.5	6.5	3.5	2	-
	1.0	500		159	499.51	3.142	10	10	9		M3	3.5	6.5	3.5	3	-
	1.5	300		63	296.88	4.712	15	15	13.5		M4	4.5	8	4.5	2	-
	1.5	500		106	499.51	4.712	15	15	13.5		M4	4.5	8	4.5	3	-
	2.0	500		79	496.37	6.283	20	20	18		M5	5.5	9.5	5.5	3	-
	2.0	1000		159	999.02	6.283	20	20	18		M5	5.5	9.5	5.5	6	-
	2.5	500		63	494.8	7.854	25	25	22.5		M6	6.5	11	6.5	3	-
	2.5	1000		127	997.45	7.854	25	25	22.5		M6	6.5	11	6.5	6	-
	3.0	500		53	499.51	9.424	30	30	27		M8	9	14	9	3	-
	3.0	1000		106	999.03	9.424	30	30	27		M8	9	14	9	6	-
(MC Nylon) Both Ends Machined Type RGEAM Economy Type RGEAMR	0.5	300	N	192	301.59	1.571	3	9	8.5	-	-	-	-	-	-	-		-	-	-
	0.8	300	N	120	301.59	2.513	4	10	9.2	-	-	-	-	-	-	-		-	-	-
	1.0	300	N, A ST, Z	95	298.45	3.142	10	12	11	180	M3	3.5	6.5	3.5	2	-
	1.0	500	N, A ST, Z	159	499.51(505)	3.142	10	12	11	180	M3	3.5	6.5	3.5	3
	1.5	500	N	105	(505)	4.712	15	20	18.5	-	-	-	-	-	-		-	-	-	-
	2.0	500		79	(505)	6.283	20	25	23	-	-	-	-	-	-		-	-	-	-
	2.5	500		63	(505)	7.854	25	30	27.5	-	-	-	-	-	-		-	-	-	-
	3.0	500		52	(505)	9.424	30	35	32	-	-	-	-	-	-		-	-	-	-

Economy Type is only available for Hole Machining N (No Hole Machining). Number of Effective Teeth ( ) and L ( ) are the value of Economy Type.

Alterations - Rack Gears

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Basic information

Tooth Type	Standard	Shape	Rack Gears	Heat Treatment	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)
94.25

98

98.96

100

101

292.17

295.31

296.88

298.45

301.59

303

494.8

496.37

499.51

505

997.45

999.02

999.03
Clear
Material
- Resin
Clear
Ground Tooth
- Not Provided
Clear
Surface Treatment
- Not Provided
- Black Oxide
Clear
Number of Effective Teeth(teeth)
9

10

11

12

14

15

20

21

29

30

31

37

38

46

47

52

53

62

63

79

94

95

105

106

120

127

159

192
Clear
Tooth Width W (or D)(mm)
3

4

10

15

20

25

30
Clear
Nominal
- 100
- 300
- 500
- 1000
Clear
Hole Machining
- A (Back Tapped)
- N (No Hole machining)
- ST (Side Tapped)
- Z (Side Counterbored)
Clear
Type
- RGEA
- RGEAB
- RGEAM
- RGEAMR
- RGEAR
- RGEAS
Clear
End Face Machining
- Economy Type
- Provided
  - Both Ends Machined Type
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.