SG / HMS Series
High-MisalignmentTapered sleeves that seat inside the ball bore, reducing the bolt diameter while extending the neck outward. Essential for off-road link travel — 44° to 66° of misalignment depending on size.
Performance Spacers & Reducers for Automotive and Industrial Use
Rod End Spacers
A rod end spacer locates the joint in its mount, adapts the bore to your bolt, and — in high-misalignment form — extends how far the joint can travel before it binds. SYZ machines three families: high-misalignment spacers (SG stainless / HMS carbon steel), cone spacers (SCNS/CNS) and mounting spacers (SCW/CW). 36 standard configurations, stainless or zinc-plated carbon steel, plus custom materials and finishes to drawing.
3 Families
SG·HMS / SCNS·CNS / SCW·CW
36 Configs
Stainless and carbon steel part numbers
1/4″ – 1″
Bolt / bore size range
44°–66°
SG/HMS misalignment angle
ISO 9001:2015 Certified
CNC Machined to ±0.01 mm
Factory Direct Sourcing
15–30 Day Lead Time
Manufacturing Since 1999
Mounting Hardware
What Are Rod End Spacers?
Small part, big impact in every assembly. Spacers — also called reducers or standoffs — are precision-machined components that set alignment, spacing and isolation between parts. They keep positioning accurate, distribute load evenly across the mount, and stop metal-to-metal contact where it would do damage.
On a rod end specifically, the spacer sits between the spherical ball bore and your mounting brackets, and does two jobs: it locates and centres the bearing inside the bracket so it runs straight, and in high-misalignment form it increases the tilt angle before the rod housing binds against the tabs. On a suspension link that is actively cycling, the second job is the one that keeps parts from breaking.
Prevent binding failures: under extreme articulation — full droop or full compression — standard mounting hardware lets the housing body bind against the brackets, which bends the threaded shank or cracks the head. High-misalignment spacers fix this by moving the pivot plane outward.
What They Actually Do
Key Functions of Spacers
Beyond alignment and spacing, spacers do several distinct technical jobs across mechanical systems — and knowing which one you need is what decides the family.
Maintain Accurate Gaps
Ensures consistent spacing between mechanical parts or layers, avoiding misalignment or collision.
Shock Absorption & Cushioning
Helps reduce vibration and mechanical wear in dynamic applications.
Structural Reinforcement
Adds rigidity and strength to mechanical structures or fastener systems.
Bore Size Adjustment
Adapts the diameter of a mounting hole so one joint can take various shaft or bolt sizes — this is the “reducer” job.
Angular Adjustment / Rotation Control
Purpose-built misalignment spacers allow angle compensation or controlled rotational offset, adding flexibility in dynamic or misaligned setups.
Product Selection
Choose Your Spacer Family
Three distinct designs, each offered in stainless steel for corrosion resistance and zinc-plated carbon steel for cost. Full size charts below each card.
SCNS / CNS Series
Cone LocatorsCone-shaped locating spacers that centre the rod end body inside the brackets while keeping solid support faces. Cone angles from 16° to 28° by size.
SCW / CW Series
Mounting SpacersShouldered mounting spacers for general setups — centring the rod end, controlling installed width, or filling the gap inside a bracket. The widest size range of the three.
SG / HMS High-Misalignment Spacers 16 configurations · dimensions in inches
| Part No. (Stainless) | Part No. (Carbon) | D +.000 −.001 | D2 ±.005 | B +.003 −.000 | W ±.005 | W2 ±.005 | Mis. Angle | Total Installed Width |
|---|---|---|---|---|---|---|---|---|
| SG10-84 | HMS10-84 | 0.624 | 0.825 | 0.500 | 0.250 | 0.360 | 54 | 1.250 |
| SG10-813 | HMS10-813 | 0.624 | 0.875 | 0.500 | 0.837 | 0.363 | 44 | 2.425 |
| SG12-84 | HMS12-84 | 0.749 | 0.850 | 0.500 | 0.250 | 0.423 | 56 | 1.375 |
| SG12-88 | HMS12-88 | 0.749 | 0.850 | 0.500 | 0.500 | 0.423 | 58 | 1.875 |
| SG12-108 | HMS12-108 | 0.749 | 0.950 | 0.625 | 0.500 | 0.423 | 52 | 1.875 |
| SG12-812 | HMS12-812 | 0.749 | 0.950 | 0.500 | 0.775 | 0.423 | 54 | 2.425 |
| SG12-816W | HMS12-816W | 0.749 | 0.875 | 0.500 | 1.000 | 0.423 | 54 | 2.875 |
| SG14-813 | HMS14-813 | 0.874 | 1.000 | 0.500 | 0.813 | 0.423 | 52 | 2.500 |
| SG14-1010 | HMS14-1010 | 0.874 | 1.062 | 0.625 | 0.625 | 0.423 | 44 | 2.125 |
| SG14-1012 | HMS14-1012 | 0.874 | 1.000 | 0.625 | 0.775 | 0.423 | 46 | 2.425 |
| SG16-910 | HMS16-910 | 0.999 | 1.250 | 0.563 | 0.625 | 0.673 | 66 | 2.625 |
| SG16-1010 | HMS16-1010 | 0.999 | 1.250 | 0.625 | 0.625 | 0.673 | 64 | 2.625 |
| SG16-1012 | HMS16-1012 | 0.999 | 1.250 | 0.625 | 0.750 | 0.673 | 60 | 2.875 |
| SG16-1013 | HMS16-1013 | 0.999 | 1.250 | 0.750 | 0.813 | 0.673 | 60 | 3.000 |
| SG16-1210 | HMS16-1210 | 0.999 | 1.250 | 0.750 | 0.625 | 0.673 | 60 | 2.625 |
| SG16-1212 | HMS16-1212 | 0.999 | 1.250 | 0.750 | 0.750 | 0.673 | 57 | 2.875 |
HMS = zinc-plated carbon steel; SG = stainless steel (optional). D is the diameter that seats in the rod end ball bore, B is the bolt bore, and Total Installed Width is the reference stack the pair occupies between your tabs — check that figure against your bracket gap before ordering.
SCNS / CNS Cone Spacers 6 configurations · dimensions in inches
| Stainless Steel | Carbon Steel | A +.000 −.001 | B ±.005 | C +.003 −.000 | D ±.005 | E ±.005 | Q Angle |
|---|---|---|---|---|---|---|---|
| SCNS5 | CNS5 | 0.412 | 5/16 | 0.083 | 0.625 | 0.312 | 22° |
| SCNS6 | CNS6 | 0.500 | 3/8 | 0.083 | 0.750 | 0.312 | 25° |
| SCNS7 | CNS7 | 0.562 | 7/16 | 0.100 | 0.750 | 0.375 | 16° |
| SCNS8 | CNS8 | 0.592 | 1/2 | 0.100 | 0.875 | 0.375 | 28° |
| SCNS10 | CNS10 | 0.750 | 5/8 | 0.100 | 1.000 | 0.375 | 28° |
| SCNS12 | CNS12 | 0.894 | 3/4 | 0.125 | 1.375 | 0.437 | 18° |
SCNS = stainless steel; CNS = zinc-plated carbon steel. Cone spacers for rod ends and spherical bearings; standard (non-cone) spacers also available. B is the bolt size.
SCW / CW Mounting Spacers 14 configurations · dimensions in inches
| Stainless Steel | Carbon Steel | Nominal Size +.000 −.001 | A ±.005 | B +.003 −.000 | C ±.005 | D ±.005 |
|---|---|---|---|---|---|---|
| SCW-8-2 | CW-8-2 | 1/2 | 0.870 | 0.510 | 0.684 | 0.230 |
| SCW-6-1 | CW-6-1 | 3/8 | 0.651 | 0.376 | 0.515 | 0.186 |
| SCW-4 | CW-4 | 1/4 | 0.700 | 0.251 | 0.331 | 0.142 |
| SCW-5 | CW-5 | 5/16 | 0.828 | 0.313 | 0.445 | 0.168 |
| SCW-6 | CW-6 | 3/8 | 0.930 | 0.376 | 0.515 | 0.184 |
| SCW-7 | CW-7 | 7/16 | 1.050 | 0.438 | 0.586 | 0.220 |
| SCW-10 | CW-10 | 5/8 | 1.420 | 0.626 | 0.839 | 0.270 |
| SCW-12 | CW-12 | 3/4 | 1.630 | 0.751 | 0.978 | 0.300 |
| SCW-8-1 | CW-8-1 | 1/2 | 0.750 | 0.510 | 0.684 | 0.230 |
| SCW-14 | CW-14 | 7/8 | 1.875 | 0.876 | 1.033 | 0.3125 |
| SCW-10-1 | CW-10-1 | 5/8 | 0.994 | 0.626 | 0.839 | 0.272 |
| SCW-12-1 | CW-12-1 | 3/4 | 1.141 | 0.751 | 0.978 | 0.302 |
| SCW-16 | CW-16 | 1.00 | 2.250 | 1.001 | 1.273 | 0.375 |
| SCW-8 | CW-8 | 1/2 | 1.240 | 0.501 | 0.684 | 0.228 |
SCW = stainless steel; CW = zinc-plated carbon steel. Note that several nominal sizes appear more than once with different shoulder profiles — 1/2″ is offered as SCW-8, SCW-8-1 and SCW-8-2 — so match on the A and C dimensions, not on nominal size alone.
Engineering Detail
How High-Misalignment Spacers Work
A standard rod end pivots until the housing contacts the mounting tabs — and that contact point, not the bearing, is usually what limits your travel. SG/HMS spacers get around it by inserting a tapered neck directly into the ball bore, pushing the bolt contact face further outward so the housing can swing considerably further before it touches anything.
The angle you gain is in the size chart: 44° to 66° across the SG/HMS range, which is a real number you can check your suspension geometry against rather than a vague “high misalignment” claim.
For maximum articulation on severe off-road setups, pair these with a high-misalignment ball (HMBL), or step up to a purpose-built high-misalignment rod end series such as HJMX, PCM or PCYM.
Sizing Guidelines & Stack Width
High-misalignment spacers are used in pairs — one each side of the rod end ball. Three things have to line up:
1. Bolt size must match the spacer’s inner bore (column B). 2. Stack width — spacer + rod end ball + spacer — must match your mounting bracket opening; use the Total Installed Width column. 3. Resulting angle must stay within what the rod end itself allows, since a spacer cannot give the joint more travel than the housing permits.
Quick Sizing Summary
| Series | Materials | Bolt / Bore Range | Angle |
|---|---|---|---|
| SG / HMS | Stainless / carbon steel | 0.500″ – 0.750″ bolt bore | 44° – 66° |
| SCNS / CNS | Stainless / carbon steel | 5/16″ – 3/4″ | 16° – 28° cone |
| SCW / CW | Stainless / carbon steel | 1/4″ – 1″ nominal | Straight (n/a) |
SG/HMS also seats a 0.624″ – 0.999″ diameter (column D) into the ball bore — match that to the rod end you are fitting, not just the bolt.
Materials
Material & Surface Finish Options
The three standard series ship in stainless or zinc-plated carbon steel. Beyond that, spacers are a machined part — so the material and finish are open to whatever the application needs.
Material Options custom / OEM programs
| Material | Why You’d Pick It |
|---|---|
| 45# Carbon Steel | High strength and cost-effective — the standard CNS / CW / HMS material, zinc plated |
| 4130 / 4140 / 4340 | Enhanced fatigue resistance for cyclic, high-shock links |
| SS304 / 316 / 17-4 PH | Corrosion resistance for marine, washdown and outdoor service — the SG / SCNS / SCW material |
| 6061 / 7075 Aluminum | Light weight where unsprung or rotating mass matters |
| Others | Brass, nylon, engineering plastic, titanium — quoted per project |
Surface Treatment Options
| Surface Treatment | Feature |
|---|---|
| Zinc Plating | Anti-rust, cost-effective — the standard finish on carbon steel spacers |
| Black Oxide | Aesthetic finish with rust protection |
| Powder Coating | Enhanced durability, UV resistant |
| E-Coating | Uniform finish, environmentally friendly process |
| Anodizing | For aluminum — various colour choices |
Zinc-nickel and other specialised coatings are available on request where the corrosion spec calls for it.
Beyond the standard chart: spacers are the easiest part in the assembly to customise — send a drawing with the bore, OD, width and material you need. If the part you actually want is a uniball cup, a jam nut or a rod end stud, those are separate ranges with their own size charts.
Applications
Where Rod End Spacers Excel
Keeping linkages bind-free across steering, suspension and machinery mounts.
Off-Road 4-Links
Required on crawlers and pre-runners so trailing arms and panhard links can cycle through their full travel arc without the housing binding on the tabs.
Race Car Steering
Centres tie-rod assemblies inside their mounting brackets and eliminates steering bind under fast rack movement.
Industrial Machinery
Sets precise mounting gaps and preload for actuator links inside brackets, keeping movement lines clean and straight.
Spherical Bearing Width Control
Where a spherical bearing package needs a controlled installed width, a compact cone spacer profile does it without adding stack height.
Corrosion-Sensitive Programs
SG, SCNS and SCW stainless versions for washdown, marine and outdoor service where a plated carbon spacer would not last.
Fabricated Chassis Hardware
Supports fabricated chassis and linkage assemblies where stack-up and shoulder size decide whether the package fits at all.
Our Strengths
Why Choose Our Spacers
Precision Machined
Tolerances controlled within ±0.01 mm — which is what a tight-fitting spacer stack actually needs if the joint is going to sit square.
Fully Customizable
We work from your drawings — custom materials, finishes and dimensions, from prototype through repeat production.
Durable and Rust-Resistant
Machined from corrosion-resistant materials such as SS304/316 and finished with zinc plating, anodizing or zinc-nickel coating for long-term rust protection.
Everything Else in the Joint Stack
Rod Ends & Heim Joints
22 series across chromoly, carbon, stainless and aluminum
Spherical Plain Bearings
COM, GE, WPB and YPB press-fit bearing elements
Uniball Cups
Weld-in housings for uniball and high-misalignment builds
Steel Balls
HMBL high-misalignment and CBL-DP replacement balls
Rod End Studs
Threaded stud in place of a through bore
Jam Nuts
Lock the length setting, RH and LH, inch and metric
Tube Adapters & Weld Bungs
4130 weld-in threaded inserts for the link body
Johnny Joints
Rebuildable flex joints for high-articulation links
Beyond the Part
Engineering, OEM & Delivery Support
From concept to container, the technical and commercial support that lets a spacer drop straight into your product.
Engineering & Design Support
Accelerate development with the technical data you need to integrate and validate with confidence.
- PDF datasheets for every series and size
- 3D STEP files for instant CAD integration
- 2D CAD drawings (DWG, DXF) for detailing
OEM / ODM Customization
From concept to global delivery, in five stages.
- Requirement analysis — application, performance metrics, target cost
- Design & 3D modeling — ideas into CAD drawings and models
- Prototyping & validation — rapid samples, fit and function testing
- Tooling & mass production — approved sample to volume
- Quality assurance — inspection at every stage
Packaging & Services
Products that arrive safe, secure and ready for your market.
- White-label box packaging — clean, brand-ready
- Multi-language manuals for global end users
- Tailored logistics with reliable worldwide support
About SYZ Rod Ends
Precision Manufacturing Since 1999
We specialise in durable, high-performance custom metal components for demanding industrial and automotive applications. Our own facility in Ningbo, together with two closely-affiliated production bases in Jiangsu, runs advanced CNC machining centres, heat-treatment lines and automated inspection systems, so every part meets strict performance, reliability and safety standards under ISO 9001:2015 certification (Cert. No. 11425Q49262R0S).
Trusted By
FAQ
Common Questions
What does a rod end spacer do?
It locates the rod end or bearing in its mount, adapts the bore to your bolt size and sets the installed width. High-misalignment versions additionally add angular clearance so the joint tilts further before binding on the mounting tabs.
What is a high-misalignment spacer?
A tapered spacer — SG in stainless, HMS in zinc-plated carbon steel — that seats in the ball bore and moves the bolt contact face outward, letting the rod end articulate to a greater angle than standard mounting allows. The SYZ range covers 44° to 66° depending on size, and it is used in pairs, one each side of the ball.
What’s the difference between the SG/HMS, SCNS/CNS and SCW/CW series?
Different jobs. SG/HMS are tapered high-misalignment spacers — pick these when you need angle. SCNS/CNS are cone spacers that centre the joint with a 16° to 28° cone face. SCW/CW are straight shouldered mounting spacers for general width control and bore reduction, and cover the widest nominal size range (1/4″ to 1″).
Stainless or carbon steel rod end spacers?
Stainless (SG, SCNS, SCW) for corrosive, outdoor, washdown or marine use. Zinc-plated carbon steel (HMS, CNS, CW) for general use at lower cost. Every part number in the charts is available in both.
How do I size rod end spacers?
Three checks. Match the spacer bore to your mounting bolt; confirm the total installed stack (spacer + ball + spacer) fits your bracket tab gap; and verify the resulting angle is within what the rod end housing itself permits. All dimensions are in the charts above and on the individual spec pages.
Do spacers increase load capacity?
No. Spacers locate the bearing, adapt the bore and set angle. Load capacity is determined by the rod end or bearing itself — and note that reducing the bolt diameter with a spacer means the bolt becomes the smaller cross-section, so size that against your load too.
What materials are available for your spacers?
The three standard series ship in stainless steel or zinc-plated carbon steel. For custom and OEM programs we also machine 4130 / 4140 / 4340 alloy steel, SS304 / 316 / 17-4 PH, 6061 / 7075 aluminum, and on request brass, engineering plastics and titanium.
What surface finishes can I choose?
Zinc plating is standard on carbon steel. Black oxide, powder coating, e-coating and anodizing (for aluminum) are all available, plus zinc-nickel and other specialised coatings where the corrosion spec calls for it.
Can you make spacers to my drawing?
Yes — spacers are among the most straightforward parts to customise. Send the bore, OD, width, material and finish, or a drawing. Each project runs through design review, prototype and customer approval before production.
How are your spacers tested?
Dimensional inspection on every batch, plus hardness and salt-spray testing where the material and finish call for it. Material certificates and inspection reports are available on request.
Are your spacers compatible with other brands?
The SG/HMS, SCNS/CNS and SCW/CW designations follow common industry conventions, so they fit most standard rod ends and spherical bearings. Match on the actual dimensions in the chart rather than on part number alone — send us the joint you are fitting if you want us to confirm.
How do I maintain the spacers?
Inspect them whenever the joint is serviced. Clean with a mild detergent, and replace any spacer showing visible wear on the ball-bore face or the bolt bore, since a worn spacer lets the joint move in the stack and accelerates wear on the rod end itself.
Factory Direct
More Details? Get a Reply in 24 Hours
Specify your series (SG/HMS, SCNS/CNS or SCW/CW), material, bore, stack dimensions and quantities — or just send a drawing.