Precision-Made OEM CNC Steering Stem for Motorbike Racing

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: OD23-38mm
• Type: Seamless
• Technique: Cold Drawn or Cold Rolled
• Material: Carbon and Alloy
• Surface Treatment: Oiled
• Usage: Hydraulic/Automobile Pipe, Machinery Industry, Special Purpose
• Section Shape: Round
• IATF16949: Yes
• Aoto Parts: Roll Cagae, Shock Absorber, Bushing
• Motorcycle Parts: Frame, Steering Column
• Mechanical Structure Pipe: Piston Pin
• Length: 5-5.8m
• Delivery Terms: EXW/Fob/CIF/CFR/DAP
• Transport Package: Bundle or Woven Packaging
• Specification: 15-75
• Trademark: bluesky pipe
• Origin: China
• HS Code: 7304319000
• Production Capacity: 50000 Ton/Year

Product Description

Product Description

The motorcycle steering stem

The motorcycle steering stem connects the handlebars to the front fork and is crucial for directing the motorcycle. Its primary function is to transmit the rider's inputs from the handlebars to the front wheel, allowing for control over the bike's direction. It is a key part of the steering system, significantly influencing handling, stability, and the rider's position. 

Transmits steering inputs: The stem acts as a rigid link, translating the rider's turning of the handlebars into movement of the front fork and wheel.

Influences handling and stability: The stem's design, material, and how it connects the handlebars and fork directly impact the bike's stability and how it handles on the road.

Sets rider position: The stem's length and angle affect the rider's position, influencing comfort and control.

Supports steering components: The steering stem assembly is supported by the steering head bearings in the motorcycle's frame, allowing for smooth and stable rotation.The steering stem are sometimes referred to collectively as the steering head or steering column. 

Design and Material Selection

The design of the steering column must take into account overall performance requirements such as steering precision, load-bearing capacity, and safety considerations. Once finalized, selecting appropriate materials becomes a critical first step in manufacturing. Commonly used materials include:

1.Carbon steel: Carbon steel is a type of steel containing carbon elements, which has good strength and plasticity, relatively low cost, and is currently one of the most widely used materials for motorcycle pillars.
2.Alloy steel: In addition to carbon, alloy steel also contains other alloying elements, which have high strength and hardness. It is suitable for use in high load, high-strength motorcycles, but the cost is relatively high.
   Bluesky company specializes in producing steel tubes for motorcycle stem, with various specifications available. The surface is black or saponified. We provide supporting services for major motorcycle brands both domestically and internationally.like Honda, Suzuki, Yamaha, Daye, Haojue , etc

 Precision Machining

Precision machining is a crucial step in the steering column manufacturing process. This process ensures that the dimensions, shape, and component fit of the steering column meet the required specifications.Among the most common machining methods are:
Turning and Milling: Lathes and milling machines are used to shape the steering column and ensure precise connections with the handlebars, front fork, and bearings.
Hole Drilling: Drilling or CNC machining is used to create accurate holes for bearing installation and handlebar attachment.

Specification

Specializing in the manufacture of premium steel pipes designed specifically for motorcycles stem, our company offers a wide array of specifications. Our products come with either a sleek black or saponified surface finish. We are proud to provide comprehensive support services to leading motorcycle brands worldwide, such as Honda, Suzuki, Yamaha, Daye, and Haojue, ensuring top-notch quality and reliability.
GRADE	external diameter	wall thickness	internal diameter	GRADE	external diameter	wall thickness	internal diameter
35#	37.5	9.75	18	20#	35.6	6.8	22
42CrMo	35.5	6	23.5	20#	35.5	7.3	20.9
35#	35.1	7.55	20	20#	34.5	10.3	13.9
20#	34.5	5.3	23.9	35#	34.5	9	16.5
37Mn5	33.8	6.9	20	20#	32.1	6.2	19.7
20#	32.1	5.2	21.7	20#/35#	32	6.4	19.2
20#	32	6	20	35#	32	6.15	19.7
20#	32	5.15	21.7	20#	32	6.05	19.9
20#	31.5	5.3	20.9	20#	31.5	4	23.5
20#	30.7	5.4	19.9	20#	30.6	4.8	21
20#	30.6	5.3	20	20#	30.6	4.8	21
35#	30.5	7.2	16.1	20#	30.5	5.3	19.9
20#	30.5	3.5	23.5	20#/35#	30.5	6.5	17.5
35#	30.5	5.3	19.9	20#	29.5	5.25	19
20#	29.4	4.5	20.4	20#	29.4	4.75	19.9
20#	29.4	4.5	20.4	20#	29.4	4.75	19.9
20#	29.3	5	19.3	20#	29	5.5	18
20#	29	5	19	35#	29	9	11
20#	28.6	3	22.6	20#	28	4	20
20#	27.5	4.75	18	20#	27.5	4.3	18.9
20#	27.5	4.5	18.5	20#	27.5	5.25	17
20#	27.5	4.25	19	20#	26.5	4.75	17
20#	26.5	3.5	19.5	20#	26	3.85	18.3
Q355	26	4.4	17.2	20#	25.7	4.3	17.1
20#	25.7	3.85	18	35#/20#	25.6	5	15.6
20#	25.4	3.5	18.4	20#	25.4	4.2	17
20#	25.4	4.7	16	20#	25.4	3	19.4
20#	25	4	17	20#	24.5	4.3	15.9
20#	24.5	4.75	15	20#	23.1	3.55	16
20#	23	3	17

Equivalent Material referance:
GB	TOCT	ASTM	BS	JIS	NF	DIN
10	10	1010,1012	045M10	S10C	XC10	C10,CK10
20	20	1020	050A20	S20C	XC18	C22,CK22
35	35	1035	060A35	S35C	XC35,C35	C35,CK35
45	45	1045	060A42\060A47	S45C	XC45	C45,CK45
15CrMo	15XM	A387 GR.B	BS1653	SCM415	15CD4	15CrMo5
20CrMo	20XM	4118	CDS110	SCM420	18CD4	20CrMo5
30CrMo	30XM	4130	1717COS110	SCM430	30CD4	25CrMo4
42CrMo	38XM	4140	708A42	SCM440	42CD4	42CrMo4
35CrMo	35XM	4135	708A37	SCM435	35CD4	34CrMo4
25Mn	25T	1025,1026	080A25,080A27			26Mn5
16Mn	14T2	SA414Gr.G	1633Gr.L	SPV32	A52C1	17Mn4/19Mn5
20Cr	20X	5120	527A19	SCr420	18C3	20Cr4
40Cr	40X	5140	530A40	SCr440	42C4	38Cr4/41Cr4
37Mn5		J55	EN46	NC-55E	38MS5	1.5122
40Mn2	40Γ2‌	1340		SMn438	40N5	42Mn6

Selection of Steel Tube for Steering Stem

Generally speaking, the most cost-effective option is to choose 20 # steel tubes. However, alloy steel tubes are often chosen for high-performance or all terrain motorcycles, which can make your steering smoother and more secure while driving. The Blue Sky brand's steering stem steel tubes can provide you with the best choice No matter which steel grade or size you want to choose, we can customize production for you. We have listed the equivalent steel grades of various countries around the world for you. No matter which country's steel grade it is, we can provide you with satisfactory steering stem steel tubes.

JIS G3445
steel grade	chemical composition%
	C	Si	Mn	P	S
STKM11A	≤0.12	≤0.35	≤0.60	≤0.040	≤0.040
STKM12A	≤0.20	≤0.35	≤0.60	≤0.040	≤0.040
STKM12B
STKM12C
STKM13A	≤0.25	≤0.35	0.30-0.90	≤0.040	≤0.040
STKM13B
STKM13C
STKM14A	≤0.30	≤0.35	0.30-1.00	≤0.040	≤0.040
STKM14B
STKM14C
steel grade	mechanical property
	Tensile strength(Mpa)		yield strength(Mpa)		elongation(%)
STKM11A	≥295				≥35
STKM12A	≥345		≥175		≥35
STKM12B	≥390		≥275		≥25
STKM12C	≥470		≥355		≥20
STKM13A	≥375		≥215		≥30
STKM13B	≥440		≥305		≥20
STKM13C	≥510		≥380		≥15
STKM14A	≥410		≥245		≥25
STKM14B	≥500		≥355		≥15
STKM14C	≥550		≥410		≥15

Certifications

Certificates and Honors

 Backed by ISO 9001,IATF16949, ISO 14001, ISO 45001, and China's "High-Tech Enterprise" certification , ensuring consistent quality.

Our products have also been certified and recognized by third-party testing agencies such as SGS. Not only that, we also have a large number of patents

FAQ

Q: Are you trading company or manufacturer?
A: We are professional manufacturer for steel pipes,and our company also is a very professional and technical foreign trade company for steel products. We have more export experience with competitive price and best after-sales service. Apart from this,we can provide a wide range of steel products to meet the requirement of customer.
Q:Will you delivery the goods on time?
A: Yes,we promise to provide best quality products and delivery on time no matter if the price change lot or not. Honesty is our company's tenet.
Q: Do you provide samples ? is it free or extra?
A: The sample could can provide for customer with free,but the freight will be covered by customer account. The sample freight will be returned to customer account after we cooperate.
Q: How can I get your quotation as soon as possible?
A: The email and fax will be checked within 24 hours,meanwhile,Wechat and WhatsApp will be online in 24 hours. Please send us your requirement and order information,specification(Steel grade,size,quantity,destination port),we will work out a best price soon.
Q: Do you have any certifications?
A: Yes,that's what we guarantee to our clients. we have IS09000,IATF16949 certinicate,ISO 14001 certificates etc.Our products are of high quality and we have professional engineers and development team.
Q: What is your terms of payment?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipmenit or paid against copy of B/L within 5 working days. 100% Irrevocable L/C at sight is favorable payment term as well.
Q: Do you accept the third party inspection?
A: Yes absolutely we accept.

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