Helical Rack Gears - L Fixed (Part Numbers - CAD Download)

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Features: Helical rack gears have a higher contact ratio than straight rack gears, resulting in superior transmission accuracy and quieter operation.
The 19° 31' 42" helical angle has a CP (circular pitch) front surface pitch, which makes it easy to design and position.
The helical rack gear is becoming the world standard in helical angles, mainly in Europe.

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Drawing / Specifications
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Part Numbers
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Dimensional Drawing

Specification Table

Alterations (Optional)

Hole Machining N: No Hole Machining

Hole Machining ST: Side Tapped

Hole Machining HT: Back Tapped

Hole Machining Z: Side Counterbored

Gear Specifications
Datum Section of Gears	Teeth perpendicular
Module	1.0 to 3.0
Pressure Angle	20°
Helix Angle	19° 31’42" RH

Enlarged View of End Face (Both Ends Machined Type)

Module	P Tolerance
0.5 to 2.0	－0.1 －0.3
2.5·3.0	－0.1 －0.4

[ ! ] F = L－B× (K－1)2

Type	[M] Material	[S] Surface Treatment
HRGEA	EN 1.1191 Equiv.	Black Oxide

[ ! ] Surface treatment is not applied to the holes in HT, ST and Z hole machining.
[ ! ] Both ends are machined to be able to connect to helical rack gears.

Specification Table

Part Number	—	L	—	Hole Machining
HRGEA1.0 HRGEA1.0	— —	300 500	— —	HT N

Accuracy: Accumulated Pitch Error (Unit: µm)

Module
0.5	1.0 to 1.5	2.0 to 2.5	3.0
110	115	120	130

Part Number		L	Hole Machining	Effective Number of Teeth	P (Front Surface Pitch)	W	H	h	B (Hole Pitch)	M (Coarse)	d₁	d₂	Z₁	K (Number of Holes)
Type	Module
HRGEA	1.0	100	N (No Hole Machining) HT (Back Tapped) ST (Side Tapped) Z (Side Counterbored)	30	3.333	10	15	14	—	—	—	—	—	—
		300		90					180	M3	3.5	6.5	3.5	2
		500		150										3
		1000		300										6
	1.5	100		20	5	15	20	18.5	—	—	—	—	—	—
		300		60					180	M4	4.5	8	4.5	2
		500		100										3
		1000		200										6
	2.0	100		15	6.667	20	25	23	—	—	—	—	—	—
		300		45					180	M5	5.5	9.5	5.5	2
		500		75										3
		1000		150										6
	2.5	100		12	8.333	25	30	27.5	—	—	—	—	—	—
		300		36					180	M6	6.5	11	6.5	2
		500		60										3
		1000		120										6
	3.0	100		10	10	30	35	32	—	—	—	—	—	—
		300		30					180	M8	9.0	14	9.0	2
		500		50										3
		1000		100										6

Alterations

Tapped Hole Dimension Change

Code

TPC

Spec.

Changes the tapped hole dimension.
Ordering Code TPC4

	M	TPC
	M3	M4
	M4	M3 M5
	M5	M4 M6
	M6	M5 M8
	M8	M6

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Part Number
HRGEA1.0-1000-HT
HRGEA1.0-1000-N
HRGEA1.0-1000-ST
HRGEA1.0-1000-Z
HRGEA1.0-100-N
HRGEA1.0-300-HT
HRGEA1.0-300-N
HRGEA1.0-300-ST
HRGEA1.0-300-Z
HRGEA1.0-500-HT
HRGEA1.0-500-N
HRGEA1.0-500-ST
HRGEA1.0-500-Z
HRGEA1.5-1000-HT
HRGEA1.5-1000-N
HRGEA1.5-1000-ST
HRGEA1.5-1000-Z
HRGEA1.5-100-N
HRGEA1.5-300-HT
HRGEA1.5-300-N
HRGEA1.5-300-ST
HRGEA1.5-300-Z
HRGEA1.5-500-HT
HRGEA1.5-500-N
HRGEA1.5-500-ST
HRGEA1.5-500-Z
HRGEA2.0-1000-HT
HRGEA2.0-1000-N
HRGEA2.0-1000-ST
HRGEA2.0-1000-Z
HRGEA2.0-100-N
HRGEA2.0-300-HT
HRGEA2.0-300-N
HRGEA2.0-300-ST
HRGEA2.0-300-Z
HRGEA2.0-500-HT
HRGEA2.0-500-N
HRGEA2.0-500-ST
HRGEA2.0-500-Z
HRGEA2.5-1000-HT
HRGEA2.5-1000-N
HRGEA2.5-1000-ST
HRGEA2.5-1000-Z
HRGEA2.5-100-N
HRGEA2.5-300-HT
HRGEA2.5-300-N
HRGEA2.5-300-ST
HRGEA2.5-300-Z
HRGEA2.5-500-HT
HRGEA2.5-500-N
HRGEA2.5-500-ST
HRGEA2.5-500-Z
HRGEA3.0-1000-HT
HRGEA3.0-1000-N
HRGEA3.0-1000-ST
HRGEA3.0-1000-Z
HRGEA3.0-100-N
HRGEA3.0-300-HT
HRGEA3.0-300-N
HRGEA3.0-300-ST

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	Module	Length L (mm)	Length (nominal)	Number of Effective Teeth (teeth)	Tooth Width W (or D) (mm)	Rack Height (mm)	Nominal	Hole Machining
123.78 €	1	7 Days	1	1000	1000	300	10	15	1000	HT (Rear Face Tapped)
101.01 €	1	7 Days	1	1000	1000	300	10	15	1000	N (No Hole Machining)
123.78 €	1	7 Days	1	1000	1000	300	10	15	1000	ST (Side Face Tapped)
123.78 €	1	7 Days	1	1000	1000	300	10	15	1000	Z (Side Countersunk Holes)
50.60 €	1	7 Days	1	100	100	30	10	15	100	N (No Hole Machining)
95.61 €	1	7 Days	1	300	300	90	10	15	300	HT (Rear Face Tapped)
83.30 €	1	7 Days	1	300	300	90	10	15	300	N (No Hole Machining)
95.61 €	1	7 Days	1	300	300	90	10	15	300	ST (Side Face Tapped)
95.61 €	1	7 Days	1	300	300	90	10	15	300	Z (Side Countersunk Holes)
124.39 €	1	7 Days	1	500	500	150	10	15	500	HT (Rear Face Tapped)
105.93 €	1	7 Days	1	500	500	150	10	15	500	N (No Hole Machining)
124.39 €	1	7 Days	1	500	500	150	10	15	500	ST (Side Face Tapped)
124.39 €	1	7 Days	1	500	500	150	10	15	500	Z (Side Countersunk Holes)
155.48 €	1	7 Days	1.5	1000	1000	200	15	20	1000	HT (Rear Face Tapped)
132.71 €	1	7 Days	1.5	1000	1000	200	15	20	1000	N (No Hole Machining)
155.48 €	1	7 Days	1.5	1000	1000	200	15	20	1000	ST (Side Face Tapped)
155.48 €	1	7 Days	1.5	1000	1000	200	15	20	1000	Z (Side Countersunk Holes)
55.64 €	1	7 Days	1.5	100	100	20	15	20	100	N (No Hole Machining)
95.96 €	1	7 Days	1.5	300	300	60	15	20	300	HT (Rear Face Tapped)
83.63 €	1	7 Days	1.5	300	300	60	15	20	300	N (No Hole Machining)
95.96 €	1	7 Days	1.5	300	300	60	15	20	300	ST (Side Face Tapped)
95.96 €	1	7 Days	1.5	300	300	60	15	20	300	Z (Side Countersunk Holes)
126.63 €	1	7 Days	1.5	500	500	100	15	20	500	HT (Rear Face Tapped)
108.17 €	1	7 Days	1.5	500	500	100	15	20	500	N (No Hole Machining)
126.63 €	1	7 Days	1.5	500	500	100	15	20	500	ST (Side Face Tapped)
126.63 €	1	7 Days	1.5	500	500	100	15	20	500	Z (Side Countersunk Holes)
179.38 €	1	7 Days	2	1000	1000	150	20	25	1000	HT (Rear Face Tapped)
156.61 €	1	7 Days	2	1000	1000	150	20	25	1000	N (No Hole Machining)
179.38 €	1	7 Days	2	1000	1000	150	20	25	1000	ST (Side Face Tapped)
179.38 €	1	7 Days	2	1000	1000	150	20	25	1000	Z (Side Countersunk Holes)
63.32 €	1	7 Days	2	100	100	15	20	25	100	N (No Hole Machining)
115.70 €	1	7 Days	2	300	300	45	20	25	300	HT (Rear Face Tapped)
103.39 €	1	7 Days	2	300	300	45	20	25	300	N (No Hole Machining)
115.70 €	1	7 Days	2	300	300	45	20	25	300	ST (Side Face Tapped)
115.70 €	1	7 Days	2	300	300	45	20	25	300	Z (Side Countersunk Holes)
92.22 €	1	7 Days	2	500	500	75	20	25	500	HT (Rear Face Tapped)
131.13 €	1	7 Days	2	500	500	75	20	25	500	N (No Hole Machining)
92.22 €	1	7 Days	2	500	500	75	20	25	500	ST (Side Face Tapped)
92.22 €	1	7 Days	2	500	500	75	20	25	500	Z (Side Countersunk Holes)
227.61 €	1	7 Days	2.5	1000	1000	120	25	30	1000	HT (Rear Face Tapped)
204.85 €	1	7 Days	2.5	1000	1000	120	25	30	1000	N (No Hole Machining)
227.61 €	1	7 Days	2.5	1000	1000	120	25	30	1000	ST (Side Face Tapped)
227.61 €	1	7 Days	2.5	1000	1000	120	25	30	1000	Z (Side Countersunk Holes)
76.37 €	1	7 Days	2.5	100	100	12	25	30	100	N (No Hole Machining)
138.27 €	1	7 Days	2.5	300	300	36	25	30	300	HT (Rear Face Tapped)
125.96 €	1	7 Days	2.5	300	300	36	25	30	300	N (No Hole Machining)
138.27 €	1	7 Days	2.5	300	300	36	25	30	300	ST (Side Face Tapped)
138.27 €	1	7 Days	2.5	300	300	36	25	30	300	Z (Side Countersunk Holes)
114.12 €	1	7 Days	2.5	500	500	60	25	30	500	HT (Rear Face Tapped)
102.74 €	1	7 Days	2.5	500	500	60	25	30	500	N (No Hole Machining)
114.12 €	1	7 Days	2.5	500	500	60	25	30	500	ST (Side Face Tapped)
114.12 €	1	7 Days	2.5	500	500	60	25	30	500	Z (Side Countersunk Holes)
264.68 €	1	7 Days	3	1000	1000	100	30	35	1000	HT (Rear Face Tapped)
241.91 €	1	7 Days	3	1000	1000	100	30	35	1000	N (No Hole Machining)
264.68 €	1	7 Days	3	1000	1000	100	30	35	1000	ST (Side Face Tapped)
264.68 €	1	7 Days	3	1000	1000	100	30	35	1000	Z (Side Countersunk Holes)
87.37 €	1	7 Days	3	100	100	10	30	35	100	N (No Hole Machining)
100.75 €	1	7 Days	3	300	300	30	30	35	300	HT (Rear Face Tapped)
93.16 €	1	7 Days	3	300	300	30	30	35	300	N (No Hole Machining)
100.75 €	1	7 Days	3	300	300	30	30	35	300	ST (Side Face Tapped)

Specifications/Overview

How to Connect Rack Gears
MIFree Cutting SteelI Helical Rack Gears are end machined with negative pitch tolerance in length.
When connecting, use an assembly gauge from the same module as a spacer jig as shown in the figure below to properly adjust the pitch.

Basic information

Tooth Type	Helical	Environmentally friendly	RoHS Compliant (10 Substances)	Shape	Rack Gears
Characteristics/Applications	Not Applicable	Material	EN 1.1191 Equiv.	Heat Treatment	Not Provided
Ground Tooth	Not Provided	Surface Treatment	Black Oxide	Material Details	EN 1.1191 Equiv.
End Face Machining	Both Ends Machined Type

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Basic Attributes

Module
1

1.5

2

2.5

3
Clear
Length L(mm)
100

300

500

1000
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Length (nominal)
100

300

500

1000
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Number of Effective Teeth(teeth)
10

12

15

20

30

36

45

50

60

75

90

100

120

150

200

300
Clear
Tooth Width W (or D)(mm)
10

15

20

25

30
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Nominal
- 100
- 300
- 500
- 1000
Clear
Hole Machining
- HT (Rear Face Tapped)
- N (No Hole Machining)
- ST (Side Face Tapped)
- Z (Side Countersunk Holes)
Clear
Type
- HRGEA
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