Shield

Assembly

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Articulated steel cylinder that protects the bore and houses the working area until the lining is placed.

Direct parts	20
Total parts	2,816
Used in	1 assembly
Class	Assembly

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Articulated steel cylinder that protects the bore and houses the working area until the lining is placed. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Shield parts and their functions

20 top-level parts · 2,816 parts in total · full bill of materials below

Shield parts diagram: 1 front shield & bulkhead, 2 middle shield, 3 tail shield, 4 articulation cylinder, 5 tail brush seal, 6 tail seal brush, 7 tail seal grease port, 8 grout injection line, 9 shield port & cover, 10 bulkhead penetration, 11 chamber agitator, 12 earth pressure sensor, 13 walkway & platform plate, 14 handrail section, 15 cylinder seal kit, and 5 more. 2,816 parts in 20 top-level items. — Shield parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Front Shield & Bulkhead	1×	Front shield with bulkhead
2	Middle Shield	1×	Articulation shield
3	Tail Shield	1×	Tail shield
4	Articulation Cylinder 4 parts	8×	Steering articulation cylinders
5	Tail Brush Seal	1×	Wire-brush tail seal
6	Tail Seal Brush	640×	three rows
7	Tail Seal Grease Port	24×	Grease injection port and line into the tail seal chambers.
8	Grout Injection Line	12×	Steel pipe through the tail skin with valve and cleaning port for backfill grout.
9	Shield Port & Cover	20×	Access, probe or injection port through the shield skin with bolted cover.
10	Bulkhead Penetration	90×	Sealed penetration for a cable, pipe or hose through the pressure bulkhead.
11	Chamber Agitator	4×	Mixing arm in the excavation chamber keeping conditioned soil flowing.
12	Earth Pressure Sensor	8×	Pressure cell in the bulkhead measuring support pressure in the excavation chamber.
13	Walkway & Platform Plate	40×	Grating or plate walkway section inside the shield or on the gantry.
14	Handrail Section	30×	Tubular handrail section with posts.
15	Cylinder Seal Kit	8×	articulation cylinders
16	Cylinder Stroke Sensor	8×	Magnetostrictive sensor inside a thrust or articulation cylinder.
17	Heavy Structural Bolt	180×	articulation joint
18	Hex Bolt	700×	High-strength hex bolt, M12 to M36, used throughout the shield, gantry and equipment mounts.
19	Hex Nut	500×	Heavy hex or nyloc nut mating the bolts.
20	Washer	500×	Hardened flat or spring washer.

3D model

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Build & assembly graph

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Bill of materials for Shield

20 top-level lines · 24 rows shown · 2,816 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Front Shield & Bulkhead	tbm-front-shield	1×	1	·	part
2	Middle Shield	tbm-middle-shield	1×	1	·	part
3	Tail Shield	tbm-tail-shield	1×	1	·	part
4	Articulation Cylinder 4 parts	tbm-articulation-cylinder	8×	8	6	assembly
4.1	Cylinder Barrel	tbm-cyl-barrel	1×	8	·	part
4.2	Cylinder Rod	tbm-cyl-rod	1×	8	·	part
4.3	O-Ring Set	oring-set	2×	16	·	part
4.4	Oil Seal	oil-seal	2×	16	·	part
5	Tail Brush Seal	tbm-tail-seal	1×	1	·	part
6	Tail Seal Brush	tbm-brush	640×	640	·	part
7	Tail Seal Grease Port	tbm-grease-injection	24×	24	·	part
8	Grout Injection Line	tbm-grout-line	12×	12	·	part
9	Shield Port & Cover	tbm-shield-port	20×	20	·	part
10	Bulkhead Penetration	tbm-bulkhead-fitting	90×	90	·	part
11	Chamber Agitator	tbm-agitator	4×	4	·	part
12	Earth Pressure Sensor	tbm-earth-pressure-sensor	8×	8	·	part
13	Walkway & Platform Plate	tbm-walkway	40×	40	·	part
14	Handrail Section	tbm-handrail	30×	30	·	part
15	Cylinder Seal Kit	tbm-cylinder-seal-kit	8×	8	·	part
16	Cylinder Stroke Sensor	tbm-stroke-sensor	8×	8	·	part
17	Heavy Structural Bolt	tbm-heavy-bolt	180×	180	·	part
18	Hex Bolt	tbm-hex-bolt	700×	700	·	part
19	Hex Nut	tbm-hex-nut	500×	500	·	part
20	Washer	tbm-washer	500×	500	·	part

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Where the shield is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Construction & Earthmoving 1 Tunnel Boring Machine

Used in 1 assembly

Tunnel Boring Machine

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks