SMC CDG1BN20-300 Round Cylinder

This is a standard double-acting round cylinder of SMC CG1 series, featuring built-in magnet ring, rubber cushion and basic mounting style. Bore size: 20 milímetros, stroke: 300 milímetros. It is applied to linear driving, positioning and clamping of automated equipment.

Explicação do código do modelo

Segmento de código	Descrição
CDG1	Series code for SMC standard round cylinders: C = Cylinder, D = With built-in magnet ring, G = Standard type, 1 = Single rod & double acting
B	Mounting code: B = tipo básico (without mounting accessories), F = Flange type, K = Foot type, T = Trunnion type, etc..
N	Cushion code: N = Rubber cushion, A = Adjustable air cushion
20	Bore size: 20 milímetros (Standard bores: 20, 25, 32, 40, 50, 63, 80, 100 milímetros)
-300	Stroke length: 300 milímetros (Standard stroke: 50~1000 mm; Custom strokes available)

Nome completo: Single rod double-acting round cylinder, basic type with built-in magnet ring and rubber cushion, bore 20 milímetros, stroke 300 milímetros.

Principais Especificações Técnicas

Categoria	Especificação	Observações
Informações gerais
Marca / Série	SMC CG1 Series	Industrial standard round cylinder
Model No.	CDG1BN20-300	Standard order number
Mounting Style	Tipo básico (accessories mountable)	Compatível com ISO 6431
Classe de Proteção	IP40	Dustproof and splash-proof
Operation Characteristics
Modo de operação	Double acting, single rod	Bi-directional pneumatic drive
Built-in Magnet Ring	Sim (marked by D)	Magnetic switch mountable for position detection
Cushion Type	Rubber cushion (marked by N)	Polyurethane cushions at both ends for impact absorption
Dimensões
Bore	20 milímetros	Tamanho padrão
Stroke	300 milímetros	Standard stroke
Piston Rod Diameter	8 milímetros	High-strength chrome-plated stainless steel
Barrel Material	Aluminium alloy (Hard anodized)	Leve & resistente à corrosão
Piston Rod Material	Aço inoxidável (SUS304)	Resistente ao desgaste & rust-proof
Peso	Aprox.. 0.8 kg	With slots for magnetic switches
Parâmetros de desempenho
Faixa de pressão operacional	0.05~1.0 MPa	For compressed air
Máx.. Operating Pressure	1.0 MPa	Transient peak ≤ 1.2 MPa
Temperatura operacional	-10°C ~ +60°C	Standard environment with dry air
Máx.. Velocidade	500 mm/s	Subject to load and air supply flow
Theoretical Output Force	31.4 N @ 0.1 MPa / 314 N @ 1.0 MPa	Calculated value under no load
Port Parameters
Port Thread	Rc1/8 (PT1/8)	Standard pneumatic thread
Number of Ports	2 (1 on front cover, 1 on rear cover)	Available for single / double acting connection
Magnetic Switch Slots	Sim (4 slots)	Compatible with SMC D-M9 series switches

Cross-brand & Obsolete Model Replacement

Modelo original	Modelo de substituição	Descrição
SMC CG1BN20-300	CDG1BN20-300	Upgraded version with built-in magnet ring, totalmente compatível
FESTO DSBC-20-300-PPVA-N3	CDG1BN20-300	Funcionalmente equivalente; 20 mm bore, 300 mm stroke, double acting with magnet ring
Airtac SE20X300S	CDG1BN20-300	Alternativa doméstica; Similar dimensions, slightly lower performance
CKD SCA2-CB-20B-300	CDG1BN20-300	Japanese brand alternative; Compatible mounting dimensions
NUMATICS R20X300	CDG1BN20-300	europeu & American brand alternative; Verify mounting style before replacement

Notas de seleção: Confirm full consistency of bore size, stroke, mounting style, cushion type and magnetic switch compatibility for replacement.

Partial Model List of CDG1B Series

Modelo	Bore (milímetros)	Stroke (milímetros)	Mounting Style	Cushion Type	Built-in Magnet Ring	Observações
CDG1BN20-50	20	50	Básico	Rubber	Sim	Standard model
CDG1BN20-100	20	100	Básico	Rubber	Sim	Standard model
CDG1BN20-150	20	150	Básico	Rubber	Sim	Standard model
CDG1BN20-200	20	200	Básico	Rubber	Sim	Standard model
CDG1BN20-250	20	250	Básico	Rubber	Sim	Standard model
CDG1BN20-300	20	300	Básico	Rubber	Sim	Subject model
CDG1BN20-350	20	350	Básico	Rubber	Sim	Standard model
CDG1BN20-400	20	400	Básico	Rubber	Sim	Standard model
CDG1AN20-300	20	300	Básico	Air cushion	Sim	Adjustable cushion
CDG1BF20-300	20	300	Flange	Rubber	Sim	Front flange mounting
CDG1BK20-300	20	300	Foot	Rubber	Sim	Bottom mounting
CDG1BT20-300	20	300	Trunnion	Rubber	Sim	Oscillating mounting

Falhas Comuns & Solução de problemas

Fenômeno de falha	Possíveis causas	Soluções
Cylinder fails to move / Slow movement	1. Insufficient air supply pressure	1. Adjust pressure to 0.4~0.6 MPa
	2. Pipeline blockage / Vazamento de ar	2. Tighten fittings and clean filter
	3. Solenoid valve failure	3. Test solenoid valve and replace if necessary
	4. Piston rod stuck	4. Dismantle to check rod straightness and clean cylinder barrel
Cylinder crawling / Shaking	1. Insufficient lubrication	1. Install air lubricator with ISO VG32 lubricant
	2. Sobrecarga	2. Reduce load or use larger bore cylinder
	3. Moisture / impurities in compressed air	3. Fit air dryer and precision filter
	4. Improper cushion adjustment	4. Adjust cushion needle valve for steady deceleration
Vazamento de ar	1. Aged / damaged sealing rings	1. Replace sealing kit (standard repair kit)
	2. Scratched piston rod	2. Repair or replace piston rod and check guide bushing
	3. Loose end cover bolts	3. Tighten end cover bolts diagonally and evenly
	4. Damaged tube fittings	4. Renew air tubes and fittings for good sealing
No signal from magnetic switch	1. Incorrect switch position	1. Reposition switch to align with piston magnet ring
	2. Failed magnet ring	2. Replace cylinder or piston assembly
	3. Damaged switch	3. Test switch continuity and replace if faulty
	4. Fiação errada	4. Check wiring and correct polarity
Poor cushioning / Loud impact noise	1. Worn cushion pads	1. Replace polyurethane cushion pads
	2. Improper cushion valve setting	2. Gradually adjust needle valve until impact noise disappears
	3. Excessive load inertia	3. Add external buffer or speed control valve
	4. Overhigh air pressure	4. Reduce working pressure and optimize system design
Bent / Deformed piston rod	1. Exposed to radial load	1. Add guide unit to avoid radial force
	2. Large coaxiality error during installation	2. Calibrate installation; keep coaxiality ≤ 0.1 mm/m
	3. Excessive impact force	3. Optimize cushion system to reduce impact
	4. Material fatigue	4. Replace piston rod or use reinforced cylinder

Aplicativo & Casos da Indústria

6.1 Cenários Aplicáveis

Linhas de produção automatizadas: Manuseio de materiais, workpiece positioning, assembly and pressing

Fabricação Eletrônica: PCB transportation, semiconductor packaging and component positioning

Máquinas de embalagem: Carton forming, vedação, labeling and filling actuators

Comida & Indústria de Bebidas: Cap tightening, bottle conveying and filling valve control

Máquinas-ferramentas: Clamp actuation, worktable positioning and tool changing mechanism

Equipamento Médico: Sample delivery and positioning for diagnostic instruments

6.2 Cenários não recomendados

Severely corrosive environment: No special anti-corrosion treatment; Not suitable for strong acid, alkali or heavy salt spray. Stainless steel series is recommended.

Oil-free operation: Long-term operation without lubrication accelerates seal wear. PTFE seals are required.

Alta frequência & high-speed operation: Not for cycling over 5 vezes por segundo. High-speed cylinder series is recommended.

Heavy radial load: Radial force will bend the rod and damage seals. Extra guide mechanism is required.

Extreme temperature: Operation below -10°C or above +60°C impairs sealing performance and service life.

6.3 Casos de aplicação típicos

Caso 1: Linha de montagem de componentes eletrônicos

Aplicativo: Positioning for component insertion on PCB

Configuração: CDG1BN20-300 + SMC D-M9B magnetic switch + precision guide rail

Efeito: Positioning accuracy ±0.1 mm with excellent repeatability, meeting automated assembly requirements.

Caso 2: Carton Sealing Station of Packaging Machine

Aplicativo: Folding carton top flaps and tape sealing

Configuração: Two CDG1BN20-300 cylinders working synchronously for dual-side flap folding

Efeito: Adjustable speed, reliable cushioning, low noise and higher sealing efficiency.

Caso 3: Automotive Parts Inspection Equipment

Aplicativo: Clamping and positioning for dimensional inspection of parts

Configuração: CDG1BN20-300 + precision pressure regulator for flexible clamping

Efeito: No workpiece damage, stable clamping force and accurate inspection data.

Diretrizes de seleção & Quick Rules
Bore size: Select by figures (20/25/32/40/50/63/80/100 milímetros); Calculate output force based on load.
Stroke: Standard range 50~1000 mm; Custom strokes are available.
Tipo de montagem: Recognized by letters: B=Basic, F=Flange, K=Foot, T=Trunnion.
Cushion type: Recognized by suffix: N=Rubber cushion, A=Adjustable air cushion.
Magnet ring: CDG1 = With built-in magnet ring; CG1 = Without magnet ring.
Replacement rule: Bore, stroke, mounting style and cushion type must be identical.

Embalagem & Order Note: 1 unit per package, minimum order quantity 1 unidade. It is recommended to prepare 2~3 units as spares for general industrial automation.

Acessórios recomendados: SMC D-M9 series magnetic switches, AC series filters, AR series pressure regulators, SY series solenoid valves.