Are there any racks which do not expand due to humidity, etc.?

Please consider purchasing DRF, which uses polyacetal with less moisture absorption than MC901, or the white plastic rack which has less dimensional change.

How much will it expand due to humidity?

The plastic rack material expands and contracts due to temperature and humidity: temperature changes of 10 degrees will lead to dimensional shifts of 0.45 mm per meter, while 2% moisture absorption will cause dimensional shifts in the range of about 5 mm.

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Part Number Complete

PRF1.5-1000

Module (M) / Circular Pitch (P) Full Length Number of Effective Teeth Length (nominal) Tooth Width type Both Ends Machined CAD Days to Ship

Specification/Dimensions

Module (M) / Circular Pitch (P)
1

1.5

2

2.5

3
Clear
Full Length(mm)
505

999.03

1005.31
Clear
Number of Effective Teeth(teeth)
52

63

79

105

106

128

159

160

212
Clear
Length (nominal)
500

1000
Clear
Tooth Width(mm)
10

15

20

25

30
Clear
type
- PR
- PRF
Clear
Both Ends Machined
- No
- Presence
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

5 Day(s) or Less

6 Day(s) or Less
Clear

Specify Alterations

Plastic rack

Name: Plastic rack
Brand: KOHARA GEAR INDUSTRY
Availability: PreOrder

Check FAQ of this product (2 items)

Brand :

KOHARA GEAR INDU...

KOHARA GEAR INDUSTRY

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Total Price :

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Days to ship :

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Product Description

MC Nylon material is used, so lightweight and can be used without lubrication. Ideal for clean rooms and equipment adverse to lubricating oil.

: 30; 45; 60

Part Number
PRF1.5-1000
PRF2-1000
PRF2.5-1000
PRF3-1000

Price	Minimum Order Qty.	Days to Ship	RoHS	Module (M) / Circular Pitch (P)	Full Length (mm)	Number of Effective Teeth (teeth)	Length (nominal)	Tooth Width (mm)	Both Ends Machined	Height (mm)
₹ 16,002.33	1 Piece(s)	6 Day(s) or more	10	1.5	999.03	212	1000	15	Presence	20
₹ 18,868.85	1 Piece(s)	6 Day(s) or more	10	2	1005.31	160	1000	20	Presence	25
₹ 24,417.27	1 Piece(s)	6 Day(s) or more	10	2.5	1005.31	128	1000	25	Presence	30
₹ 29,229.16	1 Piece(s)	6 Day(s) or more	10	3	999.03	106	1000	30	Presence	35

Basic Information

Shape	Rack	Tooth Type	Standard	Material	Resin
Surface Treatment	No	Heat Treatment	No	Ground Tooth	No
Accuracy Grade(KHK standard)	KHK R 001 - Class 5	Material	MC901

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

Frequently asked question (FAQ)

Question: Are there any racks which do not expand due to humidity, etc.?: Answer: Please consider purchasing DRF, which uses polyacetal with less moisture absorption than MC901, or the white plastic rack which has less dimensional change.
Question: How much will it expand due to humidity?: Answer: The plastic rack material expands and contracts due to temperature and humidity: temperature changes of 10 degrees will lead to dimensional shifts of 0.45 mm per meter, while 2% moisture absorption will cause dimensional shifts in the range of about 5 mm.

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