Sliding Door Roller Manufacturer · China · Since 2000

Sliding Door Rollers: Types, Sizes, Bearings and Load – A Complete Guide from the Roller Factory

A sliding door roller is the wheel-and-bearing unit that carries the weight of a sliding door or window and lets it run along a track. Choosing one means matching five things: roller type, wheel material, groove profile, bearing and rated load. HIPAD has made bearings and rollers since 2000 and supplies sliding door rollers, window rollers, roller strips, embedded rollers and bearing wheels to OEM and wholesale buyers in 60+ countries. This guide explains each choice and links to every HIPAD roller family.

Door · window · wardrobe · shower
Nylon · POM · PU · steel wheels
U · V · flat groove
ZZ / RS ball bearings
Single · tandem · strip
OEM since 2000

Request Roller Catalog & Price Browse Roller Families

HIPAD sliding door rollers, window rollers and bearing wheels in nylon and steel

What Is a Sliding Door Roller?

A sliding door roller is a small assembly of a wheel, a ball bearing and a housing (also called a carriage or bracket). Bottom-rolling rollers sit inside the lower rail of the door or window sash and run on a track in the frame. Top-hung rollers hang the door from an overhead track, as on barn doors, glass partitions and many sliding shower doors.

The roller decides how heavy a door can be, how quiet and light it feels, and how long it lasts. A roller that is too weak, uses the wrong wheel material or does not match the track profile wears flat, jumps the track or seizes. Rollers are also called sliding door wheels, door runners (UK), carriages, patio door rollers, roldanas (Spanish) and roldanas para portas or rodízios (Portuguese).

HIPAD Rollers: Key Facts

Manufacturer: HIPAD, Qingdao, China; bearing and roller production since 2000
Families: roller assemblies, roller strips, embedded rollers, adjustable and hanging rollers, nylon bracket and window rollers, track roller systems, roller wheels, miniature bearings
Wheels: nylon (PA), POM, PU, steel and stainless steel; U, V and flat grooves
Bearings: ZZ (shielded) and RS (sealed) miniature ball bearings
Housings: galvanized steel, stainless steel 304 / 316, aluminum, nylon
In-house: 60+ injection molding machines and 2000+ mold sets
Ordering: MOQ from 1000 pcs by model · samples 5–7 days · production 20–25 working days

Roller families

HIPAD Roller Families: Find the Right Range

Each family below has its own page with models, drawings and specifications. Start with the family that matches your door or window system, then send us a sample or profile drawing to confirm the exact model.

HIPAD tandem sliding door roller assembly with steel housing

Doors

Sliding Door Roller Assemblies

Single and tandem rollers in steel housings for aluminum patio doors and glass sliding doors, with height adjustment.

HIPAD multi-wheel sliding door roller strip with colored nylon wheels

Heavy doors

Sliding Door Roller Strips

Inline carriages with 4, 6 or 8 wheels that spread the load of heavy and double-glazed panels.

Concealed

Embedded Sliding Door Rollers

Rollers built into the bottom rail cavity of the profile, hidden from view, for clean aluminum door designs.

Adjustable

Adjustable & Hanging Rollers

Bracket rollers with height adjustment and hanging rollers for top-hung, wardrobe and interior sliding doors.

Windows

Nylon Bracket Window Rollers

Light, quiet nylon wheels in nylon or steel brackets for aluminum and uPVC sliding windows.

Systems

Track & Strip Roller Systems

Matched track and strip roller sets for doors, cabinets and linear sliding applications.

Wheels

Roller Wheels & Bearings

Bearing wheels in nylon, POM and steel, sold as spare wheels or for your own housings.

608ZZ miniature ball bearing for door rollers

Bearings

Miniature Ball Bearings

ZZ and RS deep-groove ball bearings from the 600, 620, 680 and 690 series used inside roller wheels.

From our catalog

Sliding Door and Window Rollers from Our Factory

A small selection of the HDR roller range. Wheel color, housing finish and packing can be changed for your brand and market. Ask for the full catalog with drawings.

HIPAD HDR02 white nylon bearing wheel with axle bolt — HDR02 · nylon bearing wheel

HIPAD HDR42 black grooved bearing wheel — HDR42 · grooved wheel

HIPAD HDR80 sliding door roller in steel housing — HDR80 · single roller

HIPAD HDR113 tandem sliding door roller with bracket — HDR113 · tandem roller

HIPAD HDR177 double wheel roller with yellow wheels — HDR177 · double wheel

HIPAD HDR77 sliding window rollers — HDR77 · window roller

HIPAD HDR70 metal grooved roller wheels — HDR70 · metal wheels

HIPAD HDR370 heavy duty sliding door roller — HDR370 · heavy-duty roller

Step 1 · Roller type

Types of Sliding Door Rollers

Roller type follows the door system. Bottom-rolling rollers carry the panel from below; top-hung rollers carry it from above. The drawings show each type in cross-section.

Grey = door or window profile, green = roller housing, dark circles = wheels, dark bar = track. Not to scale.

Roller type	How it works	Typical use	Adjustment	HIPAD family
Single-wheel roller	One bearing wheel in a housing, two per sash	Sliding windows, light interior doors	Fixed or screw-adjustable	Window rollers
Tandem (double-wheel) roller	Two wheels share the load in one housing	Aluminum patio and balcony doors	Height-adjustable	Roller assemblies
Embedded roller	Fitted inside the bottom rail cavity, not visible	Modern aluminum door profiles	Adjustable through an access hole	Embedded rollers
Roller strip (inline)	4, 6 or 8 wheels in one long housing	Heavy and double-glazed doors, Middle East style systems	Usually fixed	Roller strips
Bracket / hanging roller	Roller on a bracket fixed to the panel face or top	Wardrobes, interior and top-hung doors	Bracket slot or screw	Adjustable & hanging rollers
Top-hung glass roller	Wheels run on an overhead tube or rail; door hangs below	Glass partitions, barn doors, sliding showers	Eccentric or screw	Sliding shower hardware

Step 2 · Wheel material

Nylon vs POM vs PU vs Steel Roller Wheels

Quick answer: nylon is the standard for quiet windows and most doors; POM runs smoother with less wear; PU is the quietest on metal tracks; steel and stainless steel carry the heaviest doors and outdoor gates. Match the wheel to the track material and the door weight, not to appearance.

Wheel material	Noise	Load	Wear on aluminum track	Best for	Watch out for
Nylon (PA)	Quiet	Light to medium	Gentle	Sliding windows, residential doors, wardrobes	Can absorb moisture; flat spots if overloaded
POM (acetal)	Quiet	Medium	Gentle	Smooth, low-friction doors and windows	Costs more than nylon
PU (polyurethane tread)	Quietest	Medium to heavy	Very gentle	Premium patio doors, glass partitions	Tread can wear in dirty tracks
Steel	Louder	Heavy	Harder on soft tracks	Large and heavy doors on steel or stainless tracks	Needs corrosion protection
Stainless steel	Louder	Heavy	Harder on soft tracks	Bathrooms, coastal and outdoor doors	Higher cost

Nylon wheels are made in many colors: white, black, blue, yellow, orange and purple are all common, and many markets use color to tell systems apart. Wheel color is free to choose on OEM orders.

Step 3 · Groove and track

Match the Wheel Groove to the Track

The tread shape of the wheel must match the top of the track. A wrong match is the most common cause of noise, uneven wear and doors jumping off the track.

Wheel profile	Runs on	Strength
U-groove (round)	Round rail or round-top track	Self-centering, smooth
V-groove	V-shaped or angle track	Precise guiding, low play
Flat tread	Flat track or flat rib	Tolerant of small misalignment
Flanged (H-type)	Flat rib between two flanges	Holds the wheel on the track

Send a 100 mm piece of your track or a profile drawing. We match the groove, wheel diameter and housing height to it.

Dark = wheel (bearing in grey), mid-grey = track. Not to scale.

Step 4 · Bearing

Roller Bearings: ZZ vs RS and Common Sizes

Most door and window rollers use a miniature deep-groove ball bearing pressed into the wheel. The bearing sets the smoothness and life of the roller far more than the wheel itself. HIPAD started in 2000 as a bearing assembler, and bearings remain an in-house product line.

	ZZ (shielded)	RS / 2RS (sealed)
Closure	Two metal shields	Two rubber seals
Friction	Lower, runs lighter	Slightly higher
Dust and water	Keeps out coarse dust	Better against fine dust and splashes
Best for	Indoor doors, windows, wardrobes	Patio doors, bathrooms, dusty or coastal sites

Single-bearing wheels suit light doors. Double-bearing wheels, or two wheels per housing, keep the wheel square to the track under heavy load and resist wobble.

Standard dimensions of deep-groove ball bearings. HIPAD supplies the 600, 620, 680 and 690 series in ZZ and RS versions; see miniature ball bearings.
Bearing	Bore × OD × width (mm)	Typical roller use
623	3 × 10 × 4	Very small window and shower wheels
694	4 × 11 × 4	Small window wheels
624	4 × 13 × 5	Window and wardrobe wheels
625	5 × 16 × 5	Window and light door wheels
626	6 × 19 × 6	Door and shower rollers
608	8 × 22 × 7	Standard sliding door rollers
609	9 × 24 × 7	Larger door rollers
6900	10 × 22 × 6	Thin-section door wheels
6200	10 × 30 × 9	Heavy-duty door and gate wheels
6201	12 × 32 × 10	Heavy-duty door and gate wheels

Step 5 · Load

How to Choose a Roller for the Door Weight

Quick answer: work out the panel weight, divide it between the roller units, and choose rollers whose rated load is at least 1.5 times the share each one carries for daily use (1.25 times is the minimum for light residential doors). Most sliding panels run on two roller units, one near each end.

Estimate the panel weight

Glass weighs about 2.5 kg per m² per millimeter of thickness. Count both panes in double glazing: 5 + 5 mm = 10 mm of glass.
Add about 20–30% for an aluminum frame, or weigh one finished sash.
Example: a 1000 × 2200 mm patio sash with 5 + 12A + 5 mm double glazing: 2.2 m² × 25 kg = 55 kg of glass, plus about 25% frame = about 69 kg. Each of two rollers carries about 35 kg; with a 1.5 safety factor, choose rollers rated for at least 52 kg each, so a tandem roller is the safe choice.

Send the sash size, glass build-up and profile drawing. We recommend the roller and confirm its rated load by test.

Typical planning ranges for one sliding panel. The rated load of each HIPAD model is confirmed against your drawing and by load testing before production.
Roller type	Typical panel weight (2 roller units)
Window roller, single nylon wheel	20–40 kg
Wardrobe and interior door roller	20–40 kg
Single-wheel door roller with bearing	40–80 kg
Embedded door roller	60–120 kg
Tandem (double-wheel) door roller	80–150 kg
Top-hung multi-wheel glass roller	Up to 100–120 kg (HIPAD 4-wheel and multi-wheel hangers)
Roller strip, 4–8 wheels	120–300 kg
Steel-wheel heavy-duty roller	150–300 kg and above

Replacement & OEM

How to Measure a Sliding Door Roller

For a replacement roller or an OEM match, measure the old roller with calipers, not a ruler. These dimensions decide whether a roller fits the profile cavity and the track.

Housing length (L), width (W) and height (H), with the adjustment screw fully in.
Wheel diameter (D) and wheel width (T).
Groove profile: U, V, flat or flanged, and the groove width.
Adjustment range: how far the wheel moves up and down.
Fixing: screw hole positions, clip-in tabs or end-cap fixing.
Track: the shape and width of the track top, and its material.
Door: panel weight, glass build-up and daily use.

L, W, H = housing; D, T = wheel; adjust = height adjustment range.

Rollers by Application: Doors, Windows, Wardrobes and Showers

Application	Usual roller	Wheel	Bearing	Key requirement
Aluminum sliding window	Single-wheel or small tandem, bracket type	Nylon or POM	ZZ, 600 series	Low cost, quiet, fits the sash cavity
Aluminum patio / balcony door	Adjustable tandem or embedded roller	Nylon, POM or PU	ZZ or RS, 608 / 626	Load, height adjustment, smooth feel
Heavy or double-glazed door	Roller strip or steel-wheel tandem	Nylon or steel	RS, 608 / 6200	Load spread over many wheels
Wardrobe / interior door	Bracket or hanging roller	Nylon or POM	ZZ, small series	Silent running, compact size
Glass partition / barn door	Top-hung roller on a rail or tube	Nylon, PU or steel	RS	Look, anti-jump, door weight
Sliding shower door	Top-hung or eccentric shower roller	Nylon or POM	RS, stainless	Corrosion resistance; see sliding shower hardware

Rollers for regional profile systems

Sliding door and window profiles differ by region, and so do the rollers that fit them. HIPAD supplies rollers matched to local aluminum systems for buyers in Latin America (including Mexico, Peru and Brazil), the Middle East (including Iraq) and Central Asia, among them four-wheel inline strips for Middle East style systems and South American door profiles. Send a profile section or sample roller and we match the housing to the cavity.

Installation, Adjustment and Maintenance

Clean the track and check it is straight and undamaged before fitting new rollers.
Fit the rollers near each end of the bottom rail, usually 50–100 mm from the corners.
Lift the sash onto the track and lower it carefully so the wheels sit in the groove.
Turn the adjustment screws to raise the sash until it clears the track evenly and the gaps at the frame are parallel.
Slide the door through its full travel and check it runs quietly without rubbing.
Keep tracks clean. Vacuum dirt every few months; do not use heavy grease, which collects grit.

Common Roller Problems and Fixes

Problem	Likely cause	Fix
Door is hard to slide	Worn bearing, dirt in the track, rollers set too low	Clean the track; raise the rollers; replace worn rollers
Grinding or noise	Damaged bearing or flat spot on the wheel	Replace with sealed (RS) bearing wheels
Door jumps the track	Wrong groove profile, worn wheel, uneven height	Match the groove to the track; reset both rollers level
Wheel worn flat	Overload or wrong wheel material	Use a tandem or strip roller, or a POM / PU wheel
Rust on the housing	Plain steel in wet or coastal areas	Use stainless steel housings and RS bearings

Why buy from HIPAD

A Roller Factory That Started with Bearings

HIPAD began in 2000 assembling bearings and precision motion parts. In 2012 we upgraded to a modern factory and brought more parts in-house, and from 2016 we used our bearing and roller experience to build complete sliding systems. Our brand line, Easy Rolling, Easy Life, comes from that roller heritage. Wheels are molded on our own injection machines, bearings are fitted and tested in-house, and housings are stamped and assembled under one quality system.

25+years of bearing and roller production

60+injection molding machines for wheels

2000+mold sets for fast customization

60+countries supplied

Durability and load performance testing of HIPAD sliding door rollers — Rolling and load testing

Final assembly and functional inspection of a sliding door roller — Functional inspection

Roller housings and wheels with different surface treatments — Surface treatment

Cartons of rollers on pallets ready for export — Export packing

Quality control and testing

Incoming inspection of nylon and POM resin, steel strip and bearings
Dimensional checks of wheels and housings against the profile cavity
Continuous rolling cycle tests, static and dynamic load checks
Noise, smoothness and bracket strength checks on finished rollers
Salt spray checks for plated and stainless housings

HIPAD is ISO 9001 certified, and applicable products carry CE, GS and CSA C-UL certification. SGS or BV third-party inspection is available, and test reports are provided per model on request.

OEM / ODM rollers

Copy and improve a sample roller to fit your profile cavity
Choose wheel material, color, diameter, groove and bearing
Galvanized, stainless steel 304 / 316 or aluminum housings
Logo stamped on the housing, private-label bags and cartons, even for small quantities
Bulk packing for distributors or kit packing for window factories

1. Sample or drawing	Send a roller sample, profile section or drawing
2. Samples	5–7 days for existing molds
3. Production	20–25 working days · MOQ from 1000 pcs by model
4. Shipment	FOB Qingdao or any China port · 30% deposit, 70% before shipment

Roller buying guides

More Guides on Rollers and Bearings

How to Choose the Right Door Roller for a Sliding DoorRoller types, wheel materials, tandem rollers and replacement
Door Roller Hardware: Specs for Bulk ProjectsLoad planning, inspection and repeat orders
Sliding Door Roller Assembly: B2B Selection GuideSix checks before approving an OEM roller
Sliding Door Roller Strip: Track and Bearing Spec GuideStrip layouts and track measurement
Roller Wheel Bearings: Material and Load SelectionSingle vs double bearing, ZZ vs RS
Nylon Roller Wheel: OEM Specification ChecklistWhat to specify for nylon wheels
Miniature Ball Bearings for Door RollersBearing checks and incoming inspection
How to Choose a Sliding Door Roller ManufacturerFactory evidence and long-term supply

Sliding Door Roller Terms

Term	Meaning	Also called
Sliding door roller	Wheel, bearing and housing that carry a sliding panel	Door wheel, runner, carriage, roldana
Tandem roller	Two wheels in one housing	Double-wheel roller, twin roller
Roller strip	Long housing with 4–8 wheels in line	Inline carriage, multi-wheel roller
Embedded roller	Roller hidden inside the bottom rail	Concealed roller, built-in roller
Bottom-rolling	Door weight carried on a floor or sill track	Bottom-running
Top-hung	Door weight carried on an overhead track	Top-running, hanging
ZZ / RS	Metal-shielded / rubber-sealed ball bearing	2Z / 2RS
Groove	Shape of the wheel tread (U, V, flat)	Wheel profile

Sliding Door Roller FAQ

What are the main types of sliding door rollers?

The main types are single-wheel rollers, tandem (double-wheel) rollers, embedded rollers hidden in the profile, multi-wheel roller strips, bracket or hanging rollers, and top-hung rollers that carry the door from an overhead track. The door system and the panel weight decide which type fits.

Which is better for sliding door rollers, nylon or steel wheels?

Nylon wheels are quieter and gentler on aluminum tracks, so they suit windows and most residential doors. Steel and stainless steel wheels carry heavier loads and suit large doors on steel or stainless tracks. POM and PU wheels sit in between, with smoother and quieter running than standard nylon.

How much weight can a sliding door roller hold?

It depends on the roller type. As a planning guide, window rollers carry about 20–40 kg per sash, single-wheel door rollers 40–80 kg per panel, tandem rollers 80–150 kg and multi-wheel roller strips 120–300 kg. Choose rollers rated for at least 1.5 times the share of weight each one carries.

How do I measure a sliding door roller for replacement?

Measure the housing length, width and height, the wheel diameter and width, the groove profile, the adjustment range and the fixing method, and note the track shape. Sending the old roller or a profile section is the fastest way to get an exact match.

What is the difference between ZZ and RS bearings in rollers?

ZZ bearings have two metal shields and run with lower friction, which suits indoor doors and windows. RS bearings have rubber seals that keep out fine dust and water, which suits patio doors, bathrooms and coastal sites.

Why does my sliding door jump off the track?

The usual causes are a wheel groove that does not match the track, worn wheels, or rollers set at different heights. Match the groove profile to the track, replace worn rollers and adjust both rollers so the door sits level.

Can you make rollers to match our profile or sample?

Yes. Send a sample roller, a profile section or a drawing. We match the housing to the cavity and choose the wheel material, color, groove and bearing, using our 2000+ existing molds or a new private mold.

What is the MOQ and lead time for OEM rollers?

MOQ starts from 1000 pcs and depends on the model. Samples from existing molds take 5–7 days and mass production 20–25 working days. Logo stamping and private-label packaging are available even for small quantities.

Is HIPAD a roller manufacturer or a trading company?

HIPAD is a manufacturer that started in 2000 with bearing assembly and produces rollers with its own injection molding machines, molds and assembly lines. HIPAD is ISO 9001 certified. Qingdao Hipad International Trade Co., Ltd. handles export.

Last updated: October 2026 · Reviewed by Allen, Technical Engineer, HIPAD

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Send Your Roller Requirements To HIPAD

Why Choose Us?

A bearing and roller factory since 2000, supplying sliding door and window rollers to profile system companies, window and door factories, distributors and importers in 60+ countries. Our commitment includes:

ISO 9001 certified; CE, GS and CSA C-UL for applicable products; SGS / BV inspection available
In-house wheels, bearings and housings: 60+ injection molding machines, 2000+ molds
Samples in 5–7 days, mass production in 20–25 working days
OEM / ODM: matched to your profile, wheel color, logo and packaging, even for small quantities

Send a sample roller, profile drawing or panel weight. We reply within 24 hours with a matched model and a factory price list.

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