UKROC 25 (2025) :: Centering rings & bulkheads

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BeginnersRocket sets for beginners to get you started

Full sets with motors

Ready to fly starter sets Starter sets that you build

More beginner rockets

Starter sets without motors Ready to fly rocket kits Easiest & E2X rocket kits Easy (Skill level 1) rocket kits

Other & accessories

Beginner's essentials Rocket gifts for all occasions Schools & clubs bulk sets

Beginner rockets.

Rocketry is a great exciting and educational hobby. Our beginner sets include all you need to get flying.

Great gifts for any age to learn the ropes before progressing to more challenging models.

Our Estes and Klima starter packs include motors, a launch pad and controller. There are a few listings that don't have it all but they are mentioned on the listings if you need additional items to fly.

Model rocket kitsAll sorts of kits from the tiny mosquito to huge challenges

By skill level

Ready to fly (RTF) & almost RTF Easiest (Launchables & E2X)Easy (Skill level 1)Medium (skill level 2)Challenging (Skill level 3,4,5+)

By type

MoreBeginner sets BIG Rockets Build your own design kits Clustered motor rockets Compressed air rockets Display models High flyers High power kits (G/H upwards)Mid Power (E,F,G) & Estes Pro Mini motor models (13mm)Multi stage rockets Out of production & Vintage rockets Payloaders Radio controlled R/C Rocket cars Rocket gliders & planes Scale model rockets UFO's, fun & random Water rockets

By brand

MoreApogee rocketry Estes rockets Klima rockets Launch lab rocketry LOC Precision Madcow rocketry North coast rocketry Public Missiles Ltd Wildman rocketry

Others

MoreBulk packs for schools & clubs Compressed air rockets Radio controlled R/C Rocket cars Rocket gliders & planes UFO's. fun & random Water rockets

By features

More13mm motor mount (up to A)18mm motor mount (A to D)24mm motor mount (C, D & E)29mm motor mount (F & G)38mm motor mount (G to J)Flies up to 250m Flies 250 - 500m Flies 500 - 1000m Flies 1000 - 2500m Flies over 2500m Under 25cm tall 25 - 50cm tall 50 - 100cm tall 100 - 150cm tall Over 150cm tall

Rocket motors etcA huge variety of model rocket motors and engines to pick from

Motors by brand

MoreAll rocket motors Estes rocket motors Klima rocket motors TSP rocket motors (D to F)TSP glider motors Cesaroni motors Team / Bulk packs

Motors by impulse letter

More1/4A motors 1/2A motors A motors B motors C motors D motors E motors F motors

Motors by diameter

More13mm diameter 18mm diameter 24mm diameter 29mm diameter Under 13mm diameter 15.2mm diameter 17.2mm diameter

Consumables & Accessories

MoreIgniters, starters & matches Wadding, baffles etc Motor adapters Motor mounts Motor blanks Motor retainers Batteries Special effects Field boxes / storage Team / Bulk motor packs

The best bit of rocketry.

Your motor choice has to be right for your rocket or self build masterpiece.
We have entered loads of data about every rocket engine we stock, this means that you can click on All rockets and use the filters to narrow down on the exact engine you need.

View and filter all rocket motors

Scratch buildingAll the parts and components to make your own rockets from scratch, upgrade or repair a kit

Materials & Components

MoreAdapter plates Body tubes / Air frames Body tube couplers Bulkheads Centering rings Couplers, rings and things Electronics bay kits (e-bay)Fiberglass parts & material Fins Hardware Launch lugs & rail buttons Motor adapters Motor mounts Motor retainers Motor tube Nose cones Sheet material Thrust plates Transition adapters

Recovery system

MoreBaffles Harnesses / Shock cord Parachutes Pistons Recovery hardware & electronics Streamers Wadding & protection

Tools, glues & kits

Building and finishing supplies Construction kits Glues & Glassing Tools

Other items

Books, software & media Threads

Electronics & payloadsAltimeters, trackers flight computers and much more

Altimeters

Batteries & Chargers

Alkaline & Other batteries Lithium batteries Chargers Battery holders & cable adapters Battery connectors

Cameras

Components

Capacitors

Deplyment & Dual deployment

Electronic accessories

Electronic (e-bay) kits

Flight computers

Rocket locators / GPS trackers

Hardware

MoreStandoffs Nuts and Bolts Eye bolts Swivel links Quick links T-nuts

More Electronics & payloads →

Electronics and payloads.

Rocketry is a great exciting and educational hobby. Our beginner sets include all you need to get flying.

Great gifts for any age to learn the ropes before progressing to more challenging models.

Our Estes and Klima starter packs include motors, a launch pad and controller. There are a few listings that don't have it all but they are mentioned on the listings if you need additional items to fly.

Ground equipmentGround support equipment! Launch pads, controllers and other bits and pieces.

Launch controllers

Launch pads, rail & rods

Launch pad accessories

Display stands

Batteries & Chargers

Igniters, starters & wadding

Field boxes / Storage

Accessories & others

Ground support equipment is essential for rocketry.

You need a launch pad and launch controller to launch your rockets from. You also need wadding (or re-usable options) to protect your parachute each time.

We recommend the durable Klima launch pad and their launch controllers let you install two PP3 9v batteries at once for some extra launching juice! The Klima pad can take a 3mm or 6mm rod as well as a launch rail if required for larger rockets.

The estes pads are also great and the Porta pad E is very good for mid sized rockets also.

Schools & clubsBulk packs for schools and clubs

Bulk packs of rockets

Packs that need some building Packs that are almost ready to fly

Bulk packs of motors

24 & 30 packs of rocket motors A & B motor smaller packs All motors with search filters

Competitions

UKROC 24 (11-18 years)

Addons & accessories

MoreAltimeters Launch controllers Launch pads Wadding & spare igniters Rocketry software Components to make your own

Bulk packs for schools and clubs

You can shop for bulk packs of rockets here. We list the packs of rockets on their own with bundles on the page so you can add everything you need in one click.

The bundles include motors, launch pad(s), launch controller(s), batteries and wadding. All you will need to run your club or rocket workshop will be the required tools and consumables for construction. Rocket manuals are on each page so you can check but in general with these starter kits you will likely need the following although not all of these are required by all kits.

Some wood glue (We like gorilla glue but all sorts of PVA should be OK).
Scissors, masking tape, sand paper, decorating supplies (pens etc).

UKROCThe UK Youth rocketry challenge for 2024, it's time to get cracking!

Gifts & eventsEvents, workshops & gifts in here

Gifts and wearables

Workshops & events

BrandsFull list of all brands in the store. Browse all brands

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GB Pound (£)
EURO (€)
US Dollars ($)
Australian dollar ($)
Canadian dollar ($)
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PLN (PLN)
Norwegian Krone (kr)

English (GB)

English (GB)
Deutsch (DE)
Español (ES)
Français (FR)
Italiano (IT)
Nederlands (NL)
Polski (PL)
Čeština (CZ)

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Rocketry Ltd
Green end Cottage, Colthouse, LA22 0JS
01229 797197
Mon-Sun 10.00 - 16:30
info@modelrockets.co.uk
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info@modelrockets.co.uk

Business hours 9:30am to 4:30pm Monday to Friday

Address Rocketry Ltd, Unit 12B, Devonshire road industrial estate, Millom, Cumbria, LA18 4JS, United Kingdom

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Beginners

Full sets with motors

Ready to fly starter sets

Starter sets that you build

More beginner rockets

Starter sets without motors

Ready to fly rocket kits

Easiest & E2X rocket kits

Easy (Skill level 1) rocket kits

Other & accessories

Beginner's essentials

Rocket gifts for all occasions

Schools & clubs bulk sets

Beginner rockets.

Rocketry is a great exciting and educational hobby. Our beginner sets include all you need to get flying.

Great gifts for any age to learn the ropes before progressing to more challenging models.

Our Estes and Klima starter packs include motors, a launch pad and controller. There are a few listings that don't have it all but they are mentioned on the listings if you need additional items to fly.
Model rocket kits

By skill level

Ready to fly (RTF) & almost RTF

Easiest (Launchables & E2X)

Easy (Skill level 1)

Medium (skill level 2)

Challenging (Skill level 3,4,5+)

By type

Beginner sets

BIG Rockets

Build your own design kits

Clustered motor rockets

Compressed air rockets

Display models

High flyers

High power kits (G/H upwards)

Mid Power (E,F,G) & Estes Pro

Mini motor models (13mm)

Multi stage rockets

Out of production & Vintage rockets

Payloaders

Radio controlled R/C

Rocket cars

Rocket gliders & planes

Scale model rockets

UFO's, fun & random

Water rockets

By brand

Apogee rocketry

Estes rockets

Klima rockets

Launch lab rocketry

LOC Precision

Madcow rocketry

North coast rocketry

Public Missiles Ltd

Wildman rocketry

Others

Bulk packs for schools & clubs

Compressed air rockets

Radio controlled R/C

Rocket cars

Rocket gliders & planes

UFO's. fun & random

Water rockets

By features

13mm motor mount (up to A)

18mm motor mount (A to D)

24mm motor mount (C, D & E)

29mm motor mount (F & G)

38mm motor mount (G to J)

Flies up to 250m

Flies 250 - 500m

Flies 500 - 1000m

Flies 1000 - 2500m

Flies over 2500m

Under 25cm tall

25 - 50cm tall

50 - 100cm tall

100 - 150cm tall

Over 150cm tall
Rocket motors etc

Motors by brand

All rocket motors

Estes rocket motors

Klima rocket motors

TSP rocket motors (D to F)

TSP glider motors

Cesaroni motors

Team / Bulk packs

Motors by impulse letter

1/4A motors

1/2A motors

A motors

B motors

C motors

D motors

E motors

F motors

Motors by diameter

13mm diameter

18mm diameter

24mm diameter

29mm diameter

Under 13mm diameter

15.2mm diameter

17.2mm diameter

Consumables & Accessories

Igniters, starters & matches

Wadding, baffles etc

Motor adapters

Motor mounts

Motor blanks

Motor retainers

Batteries

Special effects

Field boxes / storage

Team / Bulk motor packs

The best bit of rocketry.

Your motor choice has to be right for your rocket or self build masterpiece.
We have entered loads of data about every rocket engine we stock, this means that you can click on All rockets and use the filters to narrow down on the exact engine you need.

View and filter all rocket motors
Scratch building

Materials & Components

Adapter plates

Body tubes / Air frames

Body tube couplers

Bulkheads

Centering rings

Couplers, rings and things

Electronics bay kits (e-bay)

Fiberglass parts & material

Fins

Hardware

Launch lugs & rail buttons

Motor adapters

Motor mounts

Motor retainers

Motor tube

Nose cones

Sheet material

Thrust plates

Transition adapters

Recovery system

Baffles

Harnesses / Shock cord

Parachutes

Pistons

Recovery hardware & electronics

Streamers

Wadding & protection

Tools, glues & kits

Building and finishing supplies

Construction kits

Glues & Glassing

Tools

Other items

Books, software & media

Threads
Electronics & payloads

Altimeters

Batteries & Chargers

Alkaline & Other batteries

Lithium batteries

Chargers

Battery holders & cable adapters

Battery connectors

Cameras

Components

Capacitors

Deplyment & Dual deployment

Electronic accessories

Electronic (e-bay) kits

Flight computers

Rocket locators / GPS trackers

Hardware

Standoffs

Nuts and Bolts

Eye bolts

Swivel links

Quick links

T-nuts

Staging

Tether release

Cable & Cables

Micro controllers & computers

Micro controllers

Microcontroller accessories

Displays

Switches & buttons

Electronic / Wifi switches

Micro switches

Panel mounting switches & buttons

PCB mounting switches & buttons

Screw switches

Voltage regulation

Relays & Power control

Egg protectors

Electronic kits & soldering kits

Servos and Solenoids

Connetors & terminal blocks

Electronics and payloads.

Rocketry is a great exciting and educational hobby. Our beginner sets include all you need to get flying.

Great gifts for any age to learn the ropes before progressing to more challenging models.

Our Estes and Klima starter packs include motors, a launch pad and controller. There are a few listings that don't have it all but they are mentioned on the listings if you need additional items to fly.
Ground equipment

Launch controllers

Launch pads, rail & rods

Launch pad accessories

Display stands

Batteries & Chargers

Igniters, starters & wadding

Field boxes / Storage

Accessories & others

Ground support equipment is essential for rocketry.

You need a launch pad and launch controller to launch your rockets from. You also need wadding (or re-usable options) to protect your parachute each time.

We recommend the durable Klima launch pad and their launch controllers let you install two PP3 9v batteries at once for some extra launching juice! The Klima pad can take a 3mm or 6mm rod as well as a launch rail if required for larger rockets.

The estes pads are also great and the Porta pad E is very good for mid sized rockets also.
Schools & clubs

Bulk packs of rockets

Packs that need some building

Packs that are almost ready to fly

Bulk packs of motors

24 & 30 packs of rocket motors

A & B motor smaller packs

All motors with search filters

Competitions

UKROC 24 (11-18 years)

Addons & accessories

Altimeters

Launch controllers

Launch pads

Wadding & spare igniters

Rocketry software

Components to make your own

Bulk packs for schools and clubs

You can shop for bulk packs of rockets here. We list the packs of rockets on their own with bundles on the page so you can add everything you need in one click.

The bundles include motors, launch pad(s), launch controller(s), batteries and wadding. All you will need to run your club or rocket workshop will be the required tools and consumables for construction. Rocket manuals are on each page so you can check but in general with these starter kits you will likely need the following although not all of these are required by all kits.

Some wood glue (We like gorilla glue but all sorts of PVA should be OK).
Scissors, masking tape, sand paper, decorating supplies (pens etc).
UKROC
Gifts & events

Gifts and wearables

Workshops & events
Brands

Real stock in house

Knowledge base & support

90-day returns

Next day delivery order by 10am*

Confused on how to start? Read our help article here

Competitions and projects

UKROC 2025

Centering rings & bulkheads

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Centering rings & bulkheads

Brand

- Estes
- Klima
- LOC Precision
- Modelrockets.co.uk
No items found matching the search criteria

Diameter

- 18mm
- 23.8mm
- 25mm
- 34mm
- 63.5mm
- 65mm
- 76mm
- 99mm
No items found matching the search criteria

Dimensions

- 23.8mm x 6.7mm
- 2x 76mm x 3.2mm
- 3mm x 63.5mm
- 3mm x 65mm
- 99mm OD - 29mm ID
No items found matching the search criteria

Inside diameter

- 18.6mm
- 19mm
- 29mm
No items found matching the search criteria

Outside diameter

- 18mm
- 23.8mm
- 34mm
No items found matching the search criteria

Weight

- 2.4g
- 2.5g
- 2.7g
- 2.8g
- 3.2g
- 3.3g
- 3.4g
- 3.7g
- 3.8g
- 4.4g
- 4.5g
- 4.6g
- 4.7g
- 4.8g
- 4.9g
- 5.1g
- 5.4g
- 5.5g
- 5.7g
- 5.8g
- 6.1g
Show all (21)Collapse
No items found matching the search criteria

In stock

- In stock
No items found matching the search criteria

Type

- Adapter bulkhead plate
- Bulkhead - wood
- Centering rings
- Thrust ring
No items found matching the search criteria

Quantity in pack

- 1
- 2
- 3
- 6
No items found matching the search criteria

Price

–

£1.73
£11.35

Centering rings and bulkheads are essential parts when building a rocket from scratch.
You can use centering rings to space tubes within tubes, an example of this is mounting your motor tube(s) within your main air-frame. We sell pretty much any size - size centering ring, so if something is missing do let us know!
Bulk heads are great for gluing in to couplers to attach eye bolts. This is a good solution to attach your payload section to your main rocket tube for example.

Example: You want to mount 3x 18mm motor tubes within a BT-70 rocket air-frame. Pick the twin pack of BT70 - 3x 18MM. This comes in a "T" version and standard version. The T version has rectangle slots for engine hooks by the tube holes.

1 2 3

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2x BT80 (65mm) 3x24mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-3x24T

Stock: 22 item(s)

£5.99 £4.99

+ −

2x BT80 65mm bulkhead with centre mark (3mm plywood)

CODE:

CR-BT80-BHCM

Stock: 24 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 4x18mm centering ring (3mm plywood)

CODE:

CR-BT80-4x18

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 3x18mm centering ring (3mm plywood)

CODE:

CR-BT80-3x18

Stock: 24 item(s)

£5.99 £4.99

+ −

99mm (3.9") OD to 29mm ID Centering rings for LOC 3.9" (99mm) Airframe

CODE:

CR-3.90-29mm

Stock: 7 item(s)

£13.62 £11.35

+ −

Centering ring 34mm OD 19mm ID - Klima

CODE:

8053

Stock: 17 item(s)

£3.26 £2.72

+ −

2x BT80 (65mm) 1x24mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-1x24T

Stock: 23 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 1x38mm centering ring (3mm plywood)

CODE:

CR-BT80-1x38

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 1x29mm centering ring (3mm plywood)

CODE:

CR-BT80-1x29

Stock: 4 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 5x18mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-5x18T

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 1x18mm centering ring (3mm plywood)

CODE:

CR-BT80-1x18

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 5x18mm centering ring (3mm plywood)

CODE:

CR-BT80-5x18

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 4x18mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-4x18T

Stock: 25 item(s)

£5.99 £4.99

+ −

Adapter plate 97mm with eyebolt - Klima

CODE:

8524

Stock: 5 item(s)

£5.62 £4.68

+ −

2x BT80 (65mm) 2x18mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-2x18T

Stock: 25 item(s)

£5.99 £4.99

+ −

3" (76mm) centering rings 2x 29mm tube holes

CODE:

CR-300-2x29mm

Stock: 3 item(s)

£11.86 £9.88

+ −

Laser cut Centering Rings and Paper Adapters - Estes

CODE:

D-ES3179

Stock: 13 item(s)

£7.49 £6.24

+ −

2x BT80 (65mm) 3x18mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-3x18T

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 6x18mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-6x18T

Stock: 25 item(s)

£5.99 £4.99

+ −

3" (76mm) centering rings 3x 29mm tube holes

CODE:

CR-300-3x29mm

Stock: 8 item(s)

£11.86 £9.88

+ −

2x BT80 (65mm) 6x18mm centering ring (3mm plywood)

CODE:

CR-BT80-6x18

Stock: 25 item(s)

£5.99 £4.99

+ −

Adapter plate 73mm with eyebolt - Klima

CODE:

8523

Stock: 11 item(s)

£4.74 £3.95

+ −

2x BT80 (65mm) 4x24mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-4x24T

Stock: 25 item(s)

£5.99 £4.99

+ −

2x BT80 (65mm) 2x24mm centering ring with cut out for retaining hook (3mm plywood)

CODE:

CR-BT80-2x24T

Stock: 25 item(s)

£5.99 £4.99

+ −

Show another 1 product

1 2 3

Сategories

Introduction to rocketry kits
Bundles of building bits
Airframe / body tubes
Airframe couplers
Air frame reducers / transitions
Altimeters for UKROC
Centering rings & bulkheads
Egg protectors
Ground equipment
Hardware
Launch lugs / Rail buttons
Motor adapters
Motor tube
Motor mounts
Motor retainers
Nose cones
Parachutes
Rocket motors UKROC
Sheet materials (fins etc)
Shock cord & harnesses
Software
Tools, glues etc
Wadding / baffles etc

Product filters

Brand

- Estes
- Klima
- LOC Precision
- Modelrockets.co.uk
No items found matching the search criteria

Hazard type

- Not dangerous goods
No items found matching the search criteria

Diameter

- 18mm
- 23.8mm
- 25mm
- 34mm
- 63.5mm
- 65mm
- 76mm
- 99mm
No items found matching the search criteria

Dimensions

- 23.8mm x 6.7mm
- 2x 76mm x 3.2mm
- 3mm x 63.5mm
- 3mm x 65mm
- 99mm OD - 29mm ID
No items found matching the search criteria

Inside diameter

- 18.6mm
- 19mm
- 29mm
No items found matching the search criteria

Outside diameter

- 18mm
- 23.8mm
- 34mm
No items found matching the search criteria

Rocket length

–

UN Classification

- Not dangerous goods
No items found matching the search criteria

Weight

- 2.4g
- 2.5g
- 2.7g
- 2.8g
- 3.2g
- 3.3g
- 3.4g
- 3.7g
- 3.8g
- 4.4g
- 4.5g
- 4.6g
- 4.7g
- 4.8g
- 4.9g
- 5.1g
- 5.4g
- 5.5g
- 5.7g
- 5.8g
- 6.1g
Show all (21)Collapse
No items found matching the search criteria

In stock

- In stock
No items found matching the search criteria

Type

- Adapter bulkhead plate
- Bulkhead - wood
- Centering rings
- Thrust ring
No items found matching the search criteria

Quantity in pack

- 1
- 2
- 3
- 6
No items found matching the search criteria

Price

–

£1.73
£11.35

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Unit 12B, Devonshire road industrial estate, Millom, LA18 4JS, United Kingdom.
Mon-Fri 09.30 - 16.00
info@modelrockets.co.uk
View on map

© 2004 - 2024 Rocketry Ltd T/As modelrockets.co.uk
Company registered in England and Wales number 15297535
VAT Number GB472370982
Explosive licence number 240011 (Cumberland council).

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